[gtk+] Update config.h.win32.in for sincos()

[Chun-wei Fan <fanchunwei src gnome org>]

commit 064f4db0129b3fd845eb221b099e8638fd32e873
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Fri Mar 6 10:49:25 2015 +0800

    Update config.h.win32.in for sincos()
    
    There was an added check in configure.ac for sincos() for gtkgears.c, where
    that function is actually a GCC- and glibc-specific extension, which is
    not available on Windows.  Reflect on this in config.h.win32.in for the
    Visual Studio/Windows builds.

 config.h.win32.in |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/config.h.win32.in b/config.h.win32.in
index 1cfb8e9..34f05c2 100644
--- a/config.h.win32.in
+++ b/config.h.win32.in
@@ -141,6 +141,9 @@
 #define HAVE_ROUND 1
 #endif
 
+/* Define to 1 if sincos() is available */
+/* #undef HAVE_SINCOS */
+
 /* Have the sockaddr_un.sun_len member */
 /* #undef HAVE_SOCKADDR_UN_SUN_LEN */