gst/avi/gstavidemux.c: OK, so the original code was too strict. It makes random AVI files hang for seconds upon openi...

Original commit message from CVS:
* gst/avi/gstavidemux.c: (gst_avi_demux_massage_index):
OK, so the original code was too strict. It makes random AVI files
hang for seconds upon opening, which is unacceptable and is far
beyond the original goal of getting multiple chunks for one-chunk
sounc stream files. So now do just that.