Fix rare FindrNumber/TermRenumber crashes when loading saves

Uncommenting this line fixes crashes when loading certain save files,
where the sizes of the terms have some interaction with SizeStoreCache.

Changing that value or setting NumStoreCaches to 0 is a works-around also.

Closes form-dev#420 and form-dev#484

Author: jodavies

sources/setfile.c

@@ -729,6 +729,8 @@ int AllocSetups(VOID)
 	AM.NumStoreCaches = sp->value;
 	sp = GetSetupPar((UBYTE *)"sizestorecache");
 	AM.SizeStoreCache = sp->value;
+	/* Make sure this is a multiple of sizeof(WORD). */
+	AM.SizeStoreCache = ((AM.SizeStoreCache+sizeof(WORD)-1)/sizeof(WORD))*sizeof(WORD);
 #ifndef WITHPTHREADS
 /*
 	Install the store caches (15-aug-2006 JV)

sources/store.c

@@ -1695,7 +1695,9 @@ PastCon:;
 					num = *from++;
 					ADDPOS(*position,sizeof(WORD));
 					*to += (WORD)num;
-/*					first = 0; */
+					/* This next line has always been commented, but uncommenting it
+					   fixes a rare bug when loading certain save files. */
+					first = 0;
 					*InCompState = (WORD)(num + 2);
 				}
 				goto PastCon;