sendmsg.c: Added __objc_msg_forward...

sendmsg.c: Added __objc_msg_forward...

Wed Jan  3 00:49:10 2001  Ovidiu Predescu  <ovidiu@cup.hp.com>

	* sendmsg.c: Added __objc_msg_forward, a hook that allows external
	libraries to provide a function that returns the real forwarding
	function. This can alleviate problems __builtin_apply() and
	friends have on various platforms. (Solution suggested by Helge
	Hess.)

	* objc/objc-api.h: Define __objc_msg_forward.

	* sendmsg.c: Define gen_rtx_REG.

From-SVN: r38652