Reverted global changes of g_new to malloc(), added back in the one place

Reverted global changes of g_new to malloc(), added back in the one place

Tue Sep 15 13:09:24 1998  Owen Taylor  <otaylor@redhat.com>

	* gdk/gdkimage.c (gdk_image_new): Reverted global changes
	of g_new to malloc(), added back in the one place where
	it actually mattered. #include <stdlib.h>.

	* gdk/gdkrgb.c: g_malloc() to malloc() as above.