ext/lame/gstlame.*: fix lame's broken vbr stuff, allow it to resample if need be...

ext/lame/gstlame.*: fix lame's broken vbr stuff, allow it to resample if need be, and also make xing header optional

Original commit message from CVS:
2004-08-13  Zaheer Abbas Merali  <zaheerabbas at merali dot org>

* ext/lame/gstlame.c: (gst_lame_vbrmode_get_type),
(gst_lame_class_init), (gst_lame_src_getcaps),
(gst_lame_sink_link), (gst_lame_init), (gst_lame_set_property),
(gst_lame_get_property), (gst_lame_setup):
* ext/lame/gstlame.h:
fix lame's broken vbr stuff, allow it to resample if need be, and also
make xing header optional