GTK+ is supposed to use glib. There is a nice g_get_home_dir function
in glib wich is a nice portable replacement for getenv("HOME") wich is
used in gtkrc.c

ChangeLog entry:

1999-01-23  Marin Purgar - PMC <pmc@iskon.hr>

	* gtkrc.c (gtk_rc_append_default_module_path): use
	g_get_home_dir instead of getenv("HOME")