splitmuxsink: Allow splitting at exactly the time/bytes threshold

76e458a119926424e9dd5acf3210a592a314d713 changed the conditions from
"queued > threshold" to "queued >= threshold", which broke hlssink2 and
resulting in too small fragments being created although keyframes would
be at *exactly* the configured threshold.

https://bugzilla.gnome.org/show_bug.cgi?id=794440
diff --git a/gst/multifile/gstsplitmuxsink.c b/gst/multifile/gstsplitmuxsink.c
index be37933..6ec436c 100644
--- a/gst/multifile/gstsplitmuxsink.c
+++ b/gst/multifile/gstsplitmuxsink.c
@@ -1320,10 +1320,10 @@
   if (g_atomic_int_get (&(splitmux->split_now)) == TRUE)
     return TRUE;
 
-  if (thresh_bytes > 0 && queued_bytes >= thresh_bytes)
+  if (thresh_bytes > 0 && queued_bytes > thresh_bytes)
     return TRUE;                /* Would overrun byte limit */
 
-  if (thresh_time > 0 && queued_time >= thresh_time)
+  if (thresh_time > 0 && queued_time > thresh_time)
     return TRUE;                /* Would overrun byte limit */
 
   /* Timecode-based threshold accounts for possible rounding errors: