patches to make gtk head build on win32 with MSVC

[Shixin Zeng <zeng shixin gmail com>]

Hi, all

I spent a day on building gtk head on win32 by utilizing OAH
(https://launchpad.net/oah) and came up with these small patches. I'm
not sure if I should file a bug report first and then attach patches
there, since they are so small and trivial.

The 6th and 7th are not required, since gdk doesn't build with
GDK_DISABLE_DEPRECTED, but I think they help cleanups anyway.
I'm not quite sure about the 5th one, but it doesn't link if
_gdk_drawable_imp_win32_get_type, since all GDK_WINDOW_HWND in
gtk/gtksocket-win32.c and others need it.

Best Regards

Shixin Zeng

Attachment: 0008-C89-style-fix.patch
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Attachment: 0001-C89-style-fix.patch
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Attachment: 0002-dereference-the-pointer-after-it-s-successfully-init.patch
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Attachment: 0003-return-1-on-failure-to-make-it-build.patch
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Attachment: 0004-include-gdk-gdkinternals.h.patch
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Attachment: 0005-export-_gdk_drawable_impl_win32_get_type-for-gtkplug.patch
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Attachment: 0006-replace-specialized-gdk_-_unref-with-g_object_unref-.patch
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Attachment: 0007-protect-_GdkFontPrivateWin32-by-GDK_DISABLE_DEPRECAT.patch
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