fix a typo in deps

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@7635 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

configure

@@ -530,7 +530,7 @@ rtp_muxer_deps="network"
 rtsp_demuxer_deps="network"
 sdp_demuxer_deps="network"
 v4l2_demuxer_deps="video4linux2"
-video_gram_device_demuxer_deps_any="video4linux bktr"
+video_grab_device_demuxer_deps_any="video4linux bktr"
 x11_grab_device_demuxer_deps="x11grab"
 
 # set temporary file name