Reset the existing slave before removing it to give it a chance to commit

Reset the existing slave before removing it to give it a chance to commit

Wed Dec 12 17:22:45 2001  Owen Taylor  <otaylor@redhat.com>
	* gtk/gtkimmulticontext.c (gtk_im_multicontext_set_slave):
	Reset the existing slave before removing it to give
	it a chance to commit and emit "preedit_changed"
	in case there was still a preedit string.