remove GLUTAPIENTRY from __glutCloseDownGameMode

src/glut/glx/glut_gamemode.c

@@ -45,7 +45,7 @@ static char *capstr[] =
 };
 #endif
 
-void __cdecl
+void
 __glutCloseDownGameMode(void)
 {
   if (__glutDisplaySettingsChanged) {

src/glut/glx/glutint.h

@@ -796,7 +796,7 @@ extern void  __glutUpdateInputDeviceMask(GLUTwindow * window);
 extern void __glutDetermineMesaSwapHackSupport(void);
 
 /* private routines from glut_gameglut.c */
-extern void GLUTAPIENTRYV __glutCloseDownGameMode(void);
+extern void __glutCloseDownGameMode(void);
 
 /* private variables from glut_swap.c (BrianP) */
 extern GLint __glutFPS;