@@ -368,8 +368,12 @@ static void LoadGrfIndexed(const char *f
SkipSprites(end);
} else { // load sprites and use indexes from start to end
do {
#ifdef NDEBUG
LoadNextSprite(start, file_index);
#else
bool b = LoadNextSprite(start, file_index);
assert(b);
#endif
} while (++start <= end);
}