"Fix" compilation with --disable-swscale.

Originally committed as revision 26200 to svn://svn.ffmpeg.org/ffmpeg/trunk

configure

@@ -1419,14 +1419,15 @@ yadif_filter_deps="gpl"
 # libraries
 avdevice_deps="avcodec avformat"
 avformat_deps="avcodec"
+avfilter_deps="swscale"
 
 # programs
 ffmpeg_deps="avcodec avformat swscale"
 ffmpeg_select="buffer_filter"
 ffplay_deps="avcodec avformat swscale sdl"
 ffplay_select="rdft"
-ffprobe_deps="avcodec avformat"
-ffserver_deps="avformat ffm_muxer rtp_protocol rtsp_demuxer"
+ffprobe_deps="avcodec avformat swscale"
+ffserver_deps="avformat ffm_muxer rtp_protocol rtsp_demuxer swscale"
 ffserver_extralibs='$ldl'
 
 doc_deps="texi2html"