gst/gst.c: Init tags stuff and some other things before loading any static plugins...

gst/gst.c: Init tags stuff and some other things before loading any static plugins (there may be other static plugins...

Original commit message from CVS:
* gst/gst.c: (init_post):
Init tags stuff and some other things before loading
any static plugins (there may be other static plugins
than just the GStreamer ones, and they may want to
register their own tags or formats or whatever, and
preferably without segfaulting).
* plugins/elements/gstqueue.c: (gst_queue_handle_src_query):
Print at least a warning in the debug logs if we drop a
query just because we don't know how to adjust the value
in the particular format.