Codechange: range based for loops instead of C-style for loops

src/newgrf_generic.cpp

@@ -93,8 +93,8 @@ static GenericCallbackList _gcl[GSF_END];
  */
 void ResetGenericCallbacks()
 {
-	for (uint8_t feature = 0; feature < lengthof(_gcl); feature++) {
-		_gcl[feature].clear();
+	for (auto &gcl : _gcl) {
+		gcl.clear();
 	}
 }