gst/gst.c: Fix empty declaration and type mismatch.

gst/gst.c: Fix empty declaration and type mismatch.

Original commit message from CVS:
2006-10-06  Zaheer Abbas Merali  <zaheerabbas at merali dot org>

Patch by: Josep Torre Valles <josep@fluendo.com>

* gst/gst.c: (gst_init_get_option_group):
Fix empty declaration and type mismatch.
* gst/gstbin.c: (gst_bin_change_state_func):
Fix type mismatch.
* gst/gstelement.c: (gst_element_continue_state),
(gst_element_set_state_func), (gst_element_change_state),
(gst_element_change_state_func):
Fix type mismatches.
* gst/gstinfo.c: (gst_debug_compare_log_function_by_func),
(gst_debug_remove_log_function), (_gst_debug_nameof_funcptr):
Cast as appropriate.
* gst/gstobject.c: (gst_class_signal_connect):
Cast as appropriate.  The function pointer parameter really
has the wrong type but would break API if we change it.
* gst/gstquery.c:
Fix redefinition of _FILE_OFFSET_BITS caused on Solaris wrt
order of including string.h.
* gst/gstutils.c: (gst_element_state_get_name):
Remove unreachable line.
* gst/gstxml.c: (gst_xml_parse_doc):
Fix type mismatch.
All these caught by Forte.