Add a `full' parameter to validate_params(), analogous to the one in

encode_params(). This is necessary for cases where generation-time parameters
that are normally omitted from descriptive IDs can place restrictions on other
parameters; in particular, when the default value of a relevant generation-time
parameter is not the one used to generate the descriptive ID, validation could
reject self-generated IDs (e.g., Net `5x2w:56182ae7c2', and some cases in
`Pegs').

[originally from svn r6068]

gtk.c

@@ -1676,7 +1676,7 @@ int main(int argc, char **argv)
                 *seed++ = '\0';
 	    thegame.decode_params(par, params);
         }
-        if ((error = thegame.validate_params(par)) != NULL) {
+        if ((error = thegame.validate_params(par, TRUE)) != NULL) {
 	    fprintf(stderr, "%s: %s\n", pname, error);
             return 1;
         }