How did I manage to check this in without actually trying to build

on Windows at all?! Fix some departures from the C standard, mostly
declaring variables after a statement has already been issued in the
same block. MSVC is picky about this where gcc is forgiving, and TBH
I'd change the latter given the choice.

[originally from svn r8166]

grid.c

@@ -81,8 +81,9 @@ static double point_line_distance(int px, int py,
                                   int bx, int by)
 {
     int det = ax*by - bx*ay + bx*py - px*by + px*ay - ax*py;
+    double len;
     det = max(det, -det);
-    double len = sqrt(SQ(ax - bx) + SQ(ay - by));
+    len = sqrt(SQ(ax - bx) + SQ(ay - by));
     return det / len;
 }
 
@@ -136,9 +137,10 @@ grid_edge *grid_nearest_edge(grid *g, int x, int y)
             int j;
             if (!f) continue;
             for (j = 0; j < f->order; j++) {
+		int new_dist;
                 grid_dot *d = f->dots[j];
                 if (d == cur) continue;
-                int new_dist = SQ(d->x - x) + SQ(d->y - y);
+                new_dist = SQ(d->x - x) + SQ(d->y - y);
                 if (new_dist < dist) {
                     new = d;
                     break; /* found closer dot */

grid.h

@@ -10,9 +10,7 @@
 #define PUZZLES_GRID_H
 
 /* Useful macros */
-#ifndef SQ
-#  define SQ(x) ( (x) * (x) )
-#endif
+#define SQ(x) ( (x) * (x) )
 
 /* ----------------------------------------------------------------------
  * Grid structures:

loopy.c

@@ -711,13 +711,15 @@ static void game_compute_size(game_params *params, int tilesize,
                               int *x, int *y)
 {
     grid *g;
+    int grid_width, grid_height, rendered_width, rendered_height;
+
     params_generate_grid(params);
     g = params->game_grid;
-    int grid_width = g->highest_x - g->lowest_x;
-    int grid_height = g->highest_y - g->lowest_y;
+    grid_width = g->highest_x - g->lowest_x;
+    grid_height = g->highest_y - g->lowest_y;
     /* multiply first to minimise rounding error on integer division */
-    int rendered_width = grid_width * tilesize / g->tilesize;
-    int rendered_height = grid_height * tilesize / g->tilesize;
+    rendered_width = grid_width * tilesize / g->tilesize;
+    rendered_height = grid_height * tilesize / g->tilesize;
     *x = rendered_width + 2 * BORDER(tilesize) + 1;
     *y = rendered_height + 2 * BORDER(tilesize) + 1;
 }
@@ -865,13 +867,15 @@ static char *game_text_format(game_state *state)
 
     /* Fill in clues */
     for (i = 0; i < g->num_faces; i++) {
+	int x1, x2, y1, y2;
+
         f = g->faces + i;
         assert(f->order == 4);
         /* Cell coordinates, from (0,0) to (w-1,h-1) */
-        int x1 = (f->dots[0]->x - g->lowest_x) / cell_size;
-        int x2 = (f->dots[2]->x - g->lowest_x) / cell_size;
-        int y1 = (f->dots[0]->y - g->lowest_y) / cell_size;
-        int y2 = (f->dots[2]->y - g->lowest_y) / cell_size;
+	x1 = (f->dots[0]->x - g->lowest_x) / cell_size;
+	x2 = (f->dots[2]->x - g->lowest_x) / cell_size;
+	y1 = (f->dots[0]->y - g->lowest_y) / cell_size;
+	y2 = (f->dots[2]->y - g->lowest_y) / cell_size;
         /* Midpoint, in canvas coordinates */
         x = x1 + x2;
         y = y1 + y2;
@@ -1592,11 +1596,13 @@ static game_state *new_game(midend *me, game_params *params, char *desc)
     int n;
     const char *dp = desc;
     grid *g;
+    int num_faces, num_edges;
+
     params_generate_grid(params);
     state->game_grid = g = params->game_grid;
     g->refcount++;
-    int num_faces = g->num_faces;
-    int num_edges = g->num_edges;
+    num_faces = g->num_faces;
+    num_edges = g->num_edges;
 
     state->clues = snewn(num_faces, signed char);
     state->lines = snewn(num_edges, char);
@@ -2979,10 +2985,12 @@ static void game_redraw(drawing *dr, game_drawstate *ds, game_state *oldstate,
 
         /* Draw clues */
         for (i = 0; i < g->num_faces; i++) {
+	    grid_face *f;
+            int x, y;
+
             c[0] = CLUE2CHAR(state->clues[i]);
             c[1] = '\0';
-            int x, y;
-            grid_face *f = g->faces + i;
+            f = g->faces + i;
             face_text_pos(ds, g, f, &x, &y);
             draw_text(dr, x, y, FONT_VARIABLE, ds->tilesize/2,
                       ALIGN_VCENTRE | ALIGN_HCENTRE, COL_FOREGROUND, c);
@@ -3236,14 +3244,18 @@ static void game_print(drawing *dr, game_state *state, int tilesize)
             double d = sqrt(SQ((double)x1 - x2) + SQ((double)y1 - y2));
             double dx = (x2 - x1) / d;
             double dy = (y2 - y1) / d;
+	    int points[8];
+
             dx = (dx * ds->tilesize) / thickness;
             dy = (dy * ds->tilesize) / thickness;
-            int points[] = {
-                x1 + dy, y1 - dx,
-                x1 - dy, y1 + dx,
-                x2 - dy, y2 + dx,
-                x2 + dy, y2 - dx
-            };
+	    points[0] = x1 + dy;
+	    points[1] = y1 - dx;
+	    points[2] = x1 - dy;
+	    points[3] = y1 + dx;
+	    points[4] = x2 - dy;
+	    points[5] = y2 + dx;
+	    points[6] = x2 + dy;
+	    points[7] = y2 - dx;
             draw_polygon(dr, points, 4, ink, ink);
         }
         else