Fix generation of libswscale.pc in ffmpeg.

extras/contrib/src/Makefile

@@ -1090,7 +1090,7 @@ ifdef HAVE_UCLIBC
 	patch -p0 < Patches/ffmpeg-svn-internal-define.patch
 	patch -p0 < Patches/ffmpeg-svn-libavformat.patch
 endif
-
+	patch -p0 < Patches/ffmpeg-svn-configure.patch
 else
 ffmpeg-$(FFMPEG_VERSION).tar.gz:
 	echo "ffmpeg snapshot is too old, you MUST use subversion !"

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

+Index: configure
+===================================================================
+--- configure	(revision 12501)
++++ configure	(working copy)
+@@ -2201,8 +2201,8 @@
+ fi
+ 
+ if enabled swscale; then
+-    pkgconfig_generate libswscale "FFmpeg image rescaling library" "$LIBSWSCALE_VERSION" -lswscale "libavutil = $LIBAVUTIL_VERSION"
+-    pkgconfig_generate_uninstalled libswscale "FFmpeg image rescaling library" "$LIBSWSCALE_VERSION" "" "libavutil = $LIBAVUTIL_VERSION"
++    pkgconfig_generate libswscale "FFmpeg image rescaling library" "$LIBSWSCALE_VERSION" "-lswscale -lm"  "libavutil = $LIBAVUTIL_VERSION"
++    pkgconfig_generate_uninstalled libswscale "FFmpeg image rescaling library" "$LIBSWSCALE_VERSION" "-lm" "libavutil = $LIBAVUTIL_VERSION"
+ else
+     pkgconfig_generate libswscale "FFmpeg image rescaling library" "$LIBSWSCALE_VERSION" "" "$pkg_requires libavcodec = $LIBAVCODEC_VERSION"
+     pkgconfig_generate_uninstalled libswscale "FFmpeg image rescaling library" "$LIBSWSCALE_VERSION" "" "$pkg_requires libavcodec = $LIBAVCODEC_VERSION"