engine: fix functions returning void returning void value

engine/client/cl_pmove.c

@@ -699,7 +699,7 @@ static int GAME_EXPORT pfnTestPlayerPosition( float *pos, pmtrace_t *ptrace )
 
 static void GAME_EXPORT pfnStuckTouch( int hitent, pmtrace_t *tr )
 {
-	return PM_StuckTouch( clgame.pmove, hitent, tr );
+	PM_StuckTouch( clgame.pmove, hitent, tr );
 }
 
 static int GAME_EXPORT pfnTruePointContents( float *p )

engine/client/in_joy.c

@@ -244,7 +244,7 @@ void Joy_AxisMotionEvent( byte axis, short value )
 		return;
 	}
 
-	return Joy_KnownAxisMotionEvent( joyaxesmap[axis], value );
+	Joy_KnownAxisMotionEvent( joyaxesmap[axis], value );
 }
 
 void Joy_KnownAxisMotionEvent( engineAxis_t engineAxis, short value )

engine/server/sv_pmove.c

@@ -366,7 +366,7 @@ static int GAME_EXPORT pfnTestPlayerPosition( float *pos, pmtrace_t *ptrace )
 
 static void GAME_EXPORT pfnStuckTouch( int hitent, pmtrace_t *tr )
 {
-	return PM_StuckTouch( svgame.pmove, hitent, tr );
+	PM_StuckTouch( svgame.pmove, hitent, tr );
 }
 
 static int GAME_EXPORT pfnPointContents( float *p, int *truecontents )