fix compilation for windows
diff --git a/progs/demos/winpos.c b/progs/demos/winpos.c
index f641526..c8f7fb3 100644
--- a/progs/demos/winpos.c
+++ b/progs/demos/winpos.c
@@ -1,4 +1,4 @@
-/* $Id: winpos.c,v 1.6 2002/12/03 03:13:17 brianp Exp $ */
+/* $Id: winpos.c,v 1.7 2003/02/27 19:43:02 kschultz Exp $ */
/*
* Example of how to use the GL_MESA_window_pos extension.
@@ -30,8 +30,8 @@
static int ImgWidth, ImgHeight;
static GLenum ImgFormat;
-static void (*WindowPosFunc)(GLfloat x, GLfloat y);
-
+typedef void (APIENTRY * PFNWINDOWPOSFUNC)(GLfloat x, GLfloat y);
+static PFNWINDOWPOSFUNC WindowPosFunc;
static void draw( void )
{