SaveState: Show warning on old / long use state.

Using save states instead of in game saves causes bugs in games, and
preserves bugs from bad settings and old PPSSPP versions.

This tells users when they might be affected.

UI/NativeApp.cpp

@@ -590,9 +590,9 @@ void NativeInit(int argc, const char *argv[], const char *savegame_dir, const ch
 #endif
 
 	if (!boot_filename.empty() && stateToLoad != NULL) {
-		SaveState::Load(stateToLoad, [](bool status, const std::string &message, void *) {
+		SaveState::Load(stateToLoad, [](SaveState::Status status, const std::string &message, void *) {
 			if (!message.empty()) {
-				osm.Show(message, 2.0);
+				osm.Show(message, status == SaveState::Status::SUCCESS ? 2.0 : 5.0);
 			}
 		});
 	}