2005-05-11  Sven Neumann  <sven@gimp.org>

	* app/display/gimpdisplayshell-scale.c (gimp_display_shell_scale):
	also zoom on mouse position if the event originates from the canvas
	(see bug #79384).

	* app/display/gimpdisplayshell-callbacks.c
	(gimp_display_shell_canvas_tool_events): replaced a g_warning()
	with g_return_if_fail().