check/gst/capslist.h: Comment test cases

check/gst/capslist.h: Comment test cases

Original commit message from CVS:

* check/gst/capslist.h:
Comment test cases
* check/gst/gststructure.c: (GST_START_TEST),
(gst_structure_suite):
Test automatic value type detection in gst_structure_from_string.
* gst/gststructure.c: (gst_structure_parse_value):
Add fraction as a type we try and guess automatically in
caps/structure strings.