check/gstcheck.h: add macros for checking refcounts on objects and caps

check/gstcheck.h: add macros for checking refcounts on objects and caps

Original commit message from CVS:

* check/gstcheck.h:
add macros for checking refcounts on objects and caps
* check/gst/gstpad.c: (START_TEST), (gst_pad_suite):
add some more unit tests
* gst/gstpad.c: (gst_pad_link_check_compatible_unlocked),
(gst_pad_link_prepare), (gst_pad_link), (gst_pad_get_allowed_caps):
fix leaked refcounts (I hope :)) so unittest works
* gst/gstpad.h:
whitespace removal