fixed annoying bug which would crash the game when pressing spacebar when the game was not in GameRunning state

asteroids/ControllerCommands.cc

@@ -107,10 +107,12 @@ bool Cmd_ControllerAttack (std::vector<std::string> args) {
 	assert (ControllerInstance);
 
 	ShipEntity* player_entity = (ShipEntity*) Engine::GetEntity (Engine::GetPlayerEntityId ());
-	assert (player_entity);
-	player_entity->Attack ();
+	if (player_entity) {
+		player_entity->Attack ();
+		return true;
+	}
 
-	return true;
+	return false;
 }
 
 void Controller::OnRegisterCommands () {

asteroids/Model.cc

@@ -359,6 +359,7 @@ int Model::DoSaveLevel (const char* filename) {
 	level_file.close();
 	return 0;
 }
+
 void Model::SetGameState (const unsigned int &state) {
 	mLastGameState = mGameState;