Fix a few missing implicit void arg declarations

While working on #535, I noticed that editormenuactionpress() still
didn't do the explicit void declaration. Then I ran `rg 'void.*\(\)'`
and found three other functions that I somehow missed in #628. Whoops.
Well, now they no longer are missed.

desktop_version/src/Game.cpp

@@ -6044,7 +6044,7 @@ bool Game::customsavequick(std::string savfile)
 }
 
 
-void Game::loadtele()
+void Game::loadtele(void)
 {
     tinyxml2::XMLDocument doc;
     if (!FILESYSTEM_loadTiXml2Document("saves/tsave.vvv", doc)) return;

desktop_version/src/Graphics.cpp

@@ -3237,7 +3237,7 @@ bool Graphics::onscreen(int t)
 	return (t >= -40 && t <= 280);
 }
 
-void Graphics::reloadresources()
+void Graphics::reloadresources(void)
 {
 	grphx.destroy();
 	grphx.init();

desktop_version/src/Render.cpp

@@ -1166,7 +1166,7 @@ static void menurender(void)
     }
 }
 
-void titlerender()
+void titlerender(void)
 {
 
     ClearSurface(graphics.backBuffer);

desktop_version/src/editor.cpp

@@ -3680,7 +3680,7 @@ void editorlogic(void)
 }
 
 
-static void editormenuactionpress()
+static void editormenuactionpress(void)
 {
     extern editorclass ed;
     switch (game.currentmenuname)