Remove now-unneeded deltaframe fix when going to in-game settings

Previously, before the game loop order got fixed, going to the in-game
settings would switch over to the new render function too early, causing
a deltaframe glitch that had to be fixed. But now, the render function
only gets switched when the current gamestate's function list gets
finished executing, so the game won't suddenly switch to titlerender()
in the middle of the ACTION press to the in-game settings screen.

As a consequence, titleupdatetextcol() no longer needs to be exported to
Input.cpp.

desktop_version/src/Input.cpp

@@ -11,7 +11,6 @@
 #include "MakeAndPlay.h"
 #include "Map.h"
 #include "Music.h"
-#include "RenderFixed.h"
 #include "Script.h"
 #include "UtilityClass.h"
 
@@ -2350,10 +2349,6 @@ static void mapmenuactionpress(void)
         }
 
         map.nexttowercolour();
-
-        // Fix delta rendering glitch
-        graphics.updatetowerbackground(graphics.titlebg);
-        titleupdatetextcol();
         break;
     }
 }

desktop_version/src/RenderFixed.cpp

@@ -7,7 +7,7 @@
 #include "Script.h"
 #include "UtilityClass.h"
 
-void titleupdatetextcol(void)
+static inline void titleupdatetextcol(void)
 {
     graphics.col_tr = graphics.titlebg.r - (help.glow / 4) - int(fRandom() * 4);
     graphics.col_tg = graphics.titlebg.g - (help.glow / 4) - int(fRandom() * 4);

desktop_version/src/RenderFixed.h

@@ -1,8 +1,6 @@
 #ifndef RENDERFIXED_H
 #define RENDERFIXED_H
 
-void titleupdatetextcol(void);
-
 void gamerenderfixed(void);
 
 void titlerenderfixed(void);