Revert "Contrib: remove patch unneeded for Windows"

This reverts commit 10b9d038.

Yeah, sorry guys, but it looks like the dxva2 code needs it :'(

extras/contrib/src/Makefile

@@ -1038,6 +1038,7 @@ ifdef HAVE_UCLIBC
 	patch -p0 < Patches/ffmpeg-svn-libavformat.patch
 endif
 ifdef HAVE_WIN32
+	(cd $@; patch -p0 < ../Patches/ffmpeg-svn-win32.patch)
 	(cd $@; patch -p0 < ../Patches/ffmpeg-dxva2.patch)
 endif
 ifdef NO_TEXT_RELOCATION

extras/contrib/src/Patches/ffmpeg-svn-win32.patch

+--- configure.orig	2009-07-26 00:06:36.000000000 +0200
++++ configure	2009-07-26 00:08:21.000000000 +0200
+@@ -1674,7 +1674,7 @@
+ fi
+ 
+ add_cppflags -D_ISOC99_SOURCE -D_POSIX_C_SOURCE=200112
+-check_cflags -std=c99
++#check_cflags -std=c99
+ check_cc -D_FILE_OFFSET_BITS=64 <<EOF && add_cppflags -D_FILE_OFFSET_BITS=64
+ #include <stdlib.h>
+ EOF