Some minor fixes to the unfinished Pearl solver:

- move critical correctness checks out of diagnostic ifdefs (ahem)
 - move declarations to before conditionally compiled code (we don't
   build in C99 mode round here)
 - tidy up an unsightly blank line while I'm here.

[originally from svn r8969]

unfinished/pearl.c

@@ -217,6 +217,7 @@ int pearl_solve(int w, int h, char *clues, char *result)
      * Now repeatedly try to find something we can do.
      */
     while (1) {
+	int done_something = FALSE;
 
 #ifdef SOLVER_DIAGNOSTICS
 	for (y = 0; y < H; y++) {
@@ -226,8 +227,6 @@ int pearl_solve(int w, int h, char *clues, char *result)
 	}
 #endif
 
-	int done_something = FALSE;
-
 	/*
 	 * Go through the square state words, and discard any
 	 * square state which is inconsistent with known facts
@@ -267,9 +266,9 @@ int pearl_solve(int w, int h, char *clues, char *result)
 		if (!workspace[(2*y+1)*W+(2*x+1)]) {
 #ifdef SOLVER_DIAGNOSTICS
 		    printf("edge check at (%d,%d): inconsistency\n", x, y);
+#endif
 		    ret = 0;
 		    goto cleanup;
-#endif
 		}
 	    }
 
@@ -298,9 +297,9 @@ int pearl_solve(int w, int h, char *clues, char *result)
 		if (edgeand & ~edgeor) {
 #ifdef SOLVER_DIAGNOSTICS
 		    printf("square check at (%d,%d): inconsistency\n", x, y);
+#endif
 		    ret = 0;
 		    goto cleanup;
-#endif
 		}
 
 		for (d = 1; d <= 8; d += d) {
@@ -385,7 +384,6 @@ int pearl_solve(int w, int h, char *clues, char *result)
 			}
 		    }
 
-
 		    break;
 		  case STRAIGHT:
 		    /*