gst/: gst_[buffer|event|message]_ref() macros are replaced by a static inline functio...

gst/: gst_[buffer|event|message]_ref() macros are replaced by a static inline functions because gcc-4.1 will about if...

Original commit message from CVS:
* gst/gstbuffer.h:
* gst/gstevent.h:
* gst/gstmessage.h:
gst_[buffer|event|message]_ref() macros are replaced by a static
inline functions because gcc-4.1 will about if the return value
isn't used.
* tests/check/gst/gstevent.c: (event_probe):
gst_event_ref now has to be given a GstEvent* , fix check accordingly.