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/editor.cpp

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