sys/ximage/ximagesink.c: Change to using a framerate of [1,100] instead of [0,MAX...

sys/ximage/ximagesink.c: Change to using a framerate of [1,100] instead of [0,MAX], since 0 isn't handled correctly, ...

Original commit message from CVS:
* sys/ximage/ximagesink.c: (gst_ximagesink_handle_xevents),
(gst_ximagesink_xcontext_get), (gst_ximagesink_getcaps),
(gst_ximagesink_set_xwindow_id): Change to using a framerate
of [1,100] instead of [0,MAX], since 0 isn't handled correctly,
and neither is 100+, most likely.
* sys/xvimage/xvimagesink.c: (gst_xvimagesink_get_xv_support),
(gst_xvimagesink_getcaps): same