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/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();