Client builds & runs, can't test the gameplay without the server

SDL_ttf is now being initialized, and all usages of fonts are now checked for nullptr.
A bug where the renderer's logical size was not properly set has been fixed.
The FPS counter is disabled for now.

client/gameplay_scenes/world_logic.cpp

@@ -43,6 +43,13 @@ World::World(int* const argClientIndex,	int* const argAccountIndex):
 	buttonImage.Load(GetRenderer(), config["dir.interface"] + "button.png");
 	font = TTF_OpenFont(config["client.font"].c_str(), 12);
 
+	//check that the font loaded
+	if (!font) {
+		std::ostringstream msg;
+		msg << "Failed to load a font file; " << SDL_GetError();
+		throw(std::runtime_error(msg.str()));
+	}
+
 	//setup the buttons
 	disconnectButton.SetBackgroundTexture(GetRenderer(), buttonImage.GetTexture());
 	disconnectButton.SetText(GetRenderer(), font, "Disconnect", {255, 255, 255, 255});
@@ -216,6 +223,10 @@ void World::MouseButtonUp(SDL_MouseButtonEvent const& event) {
 	}
 }
 
+void World::MouseWheel(SDL_MouseWheelEvent const& event) {
+	//
+}
+
 void World::KeyDown(SDL_KeyboardEvent const& key) {
 	//hotkeys
 	switch(key.keysym.sym) {