[gtkmm] Color: Fix the build with --enable-warnings=fatal.

[Murray Cumming <murrayc src gnome org>]

commit c8249bf23e4abfac9ad5decfe2aae40e1cbf707c
Author: Murray Cumming <murrayc murrayc com>
Date:   Fri May 30 08:55:08 2014 +0200

    Color: Fix the build with --enable-warnings=fatal.
    
    * gdk/src/color.hg: Disable GTK+ deprecation warnings for the .cc file
      so we can still build our (also deprecated) implementation.

 gdk/src/color.hg |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/gdk/src/color.hg b/gdk/src/color.hg
index b1895e1..75b074f 100644
--- a/gdk/src/color.hg
+++ b/gdk/src/color.hg
@@ -24,6 +24,11 @@ _CONFIGINCLUDE(gdkmmconfig.h)
 
 _DEFS(gdkmm,gdk)
 
+#m4 _PUSH(SECTION_CC_PRE_INCLUDES)
+#undef GDK_DISABLE_DEPRECATED
+#define GDK_DISABLE_DEPRECATION_WARNINGS 1
+#m4 _POP()
+
 namespace Gdk
 {