[MOVED FROM BAD] I'm a bad boy. using /1001. to force C to do float division and not integer division (as it did in my last commit)

Original commit message from CVS:
* ext/dv/gstdvdec.c:
* gst/subparse/gstsubparse.c: (parse_mdvdsub):
* gst/y4m/gsty4mencode.c: (gst_y4mencode_sinkconnect):
I'm a bad boy. using /1001. to force C to do float division
and not integer division (as it did in my last commit)
Thanks to David I. Lehn for pointing this mistake.