Remove stray extra parameter from libavutil pkg-config command.

Originally committed as revision 13062 to svn://svn.ffmpeg.org/ffmpeg/trunk

configure

@@ -2199,6 +2199,6 @@ else
 fi
 
 if enabled avfilter; then
-  pkgconfig_generate libavfilter "FFmpeg video filtering library" "$LIBAVFILTER_VERSION" "-lavfilter $extralibs" "$pkg_requires libavutil = $LIBAVUTIL_VERSION" ffmpeg
+  pkgconfig_generate libavfilter "FFmpeg video filtering library" "$LIBAVFILTER_VERSION" "-lavfilter $extralibs" "$pkg_requires libavutil = $LIBAVUTIL_VERSION"
   pkgconfig_generate_uninstalled libavfilter "FFmpeg video filtering library" "$LIBAVFILTER_VERSION" "$extralibs" "$pkg_requires libavutil = $LIBAVUTIL_VERSION"
 fi