2004-02-15  Michael Natterer  <mitch@gimp.org>

	* app/core/gimpdata.c (gimp_data_init): using
	FOO_GET_CLASS(instance) in a GInstanceInitFunc doesn't work
	because during instance init, the object's class is always set to
	be the class of the currently called init function. Use the second
	parameter of GInstanceInitFunc instead, which is the instance's
	real class. Fixes bug #134274.