Not all compilers allow pointer comparison with anything but the pointer type...

Not all compilers allow pointer comparison with anything but the pointer type or NULL! Just wondering when the Level* level should be < 0? I think != NULL is the correct statement.Please correct if not!

src/game/game.cpp

@@ -107,7 +107,7 @@ int Game::setBonus (int ext) {
 
 	if (bonusFile) delete[] bonusFile;
 
-	if (level >= 0) bonusFile = createFileName(F_BONUSMAP, ext);
+	if (level != NULL) bonusFile = createFileName(F_BONUSMAP, ext);
 	else bonusFile = NULL;
 
 	return E_NONE;