Fix the FFmpeg libraries detection.

git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@3591 92316355-f0b4-4df1-b90c-862c8a59935f

configure.ac

@@ -219,6 +219,7 @@ PKG_CHECK_MODULES([LIBAVCODEC], [libavcodec-uninstalled], [:], [ac_cv_my_have_ff
 PKG_CHECK_MODULES([LIBAVFORMAT], [libavformat-uninstalled], [:], [ac_cv_my_have_ffmpeg=no])
 PKG_CHECK_MODULES([LIBSWSCALE], [libswscale-uninstalled], [:], [ac_cv_my_have_ffmpeg=no])
 if test "${ac_cv_my_have_ffmpeg}" = "no"; then
+  ac_cv_my_have_ffmpeg="yes"
   PKG_CHECK_MODULES([LIBAVCODEC], [libavcodec], [:], [ac_cv_my_have_ffmpeg=no])
   PKG_CHECK_MODULES([LIBAVFORMAT], [libavformat], [:], [ac_cv_my_have_ffmpeg=no])
   PKG_CHECK_MODULES([LIBSWSCALE], [libswscale], [:], [ac_cv_my_have_ffmpeg=no])