Added check for default gamestate

NothinFancy/src/Application.cpp

@@ -47,8 +47,14 @@ namespace nf {
 	}
 
 	void Application::addDefaultState(IGamestate* in) {
-		(*in).onEnter();
-		m_activeStates.push_back(in);
+		if (!m_defaultStateAdded) {
+			(*in).onEnter();
+			m_activeStates.push_back(in);
+			m_defaultStateAdded = true;
+		}
+		else {
+			Error("More than one default state defined"); //TODO: Test this
+		}
 	}
 
 	void Application::run() {

NothinFancy/src/include/Application.h

@@ -56,5 +56,6 @@ namespace nf {
 		//The currently active and loaded states where the top-most is the current one
 		std::vector<IGamestate*> m_activeStates;
 		IntroGamestate* m_sIntro;
+		bool m_defaultStateAdded = false;
 	};
 }