Port GNU/Emacs dbusbind.c to SXEmacs -- Fix most errors.

Port GNU/Emacs dbusbind.c to SXEmacs -- Fix most errors.

This changeset continues the work in porting GNU/Emacs' dbusbind.c.  It is
still not finished.  The build is still badly broken.

	* src/elhash.c: Make Q_test not static.

	* modules/dbus/dbusbind.c (CHECK_DBUS_SERIAL_GET_SERIAL): We call
	`MOST_POSITIVE_FIXNUM' a `EMACS_INT_MAX'.

	* modules/dbus/dbusbind.c (xd_signature_cat): ptrdiff_t's -> int's

	* modules/dbus/dbusbind.c (Fdbus_call_method): Ditto.

	* modules/dbus/dbusbind.c (Fdbus_call_method_asynchronously): Ditto.

	* modules/dbus/dbusbind.c (Fdbus_method_return_internal): Ditto.

	* modules/dbus/dbusbind.c (Fdbus_method_error_internal): Ditto.

	* modules/dbus/dbusbind.c (Fdbus_send_signal): Ditto.

	* modules/dbus/dbusbind.c (Fdbus_register_service): Ditto.

	* modules/dbus/dbusbind.c (Fdbus_register_signal): Ditto.

	* modules/dbus/dbusbind.c (xd_read_queued_messages): Add missing
	arg to internal_catch().

	* modules/dbus/dbusbind.c (syms_of_dbusbind): Change GNU DEFSYM's
	and defsubr's to our defsymbol and DEFSUBR respectively.

	* modules/dbus/dbusbind.c (syms_of_dbusbind): SXEmacs-erise the
	Fprovide().

Signed-off-by: Steve Youngs <steve@sxemacs.org>