* libnautilus/nautilus-gtk-macros.h: Since the prototypes for
	GtkObjectInitFunc and GtkClassInitFunc just have a 'gpointer' for the args,
	cast the given values to these function types, so that people can use the actual
	pointer types as arguments without receiving a warning.

	* src/ntl-index-panel.c: Change to match. Also set
	object_klass->destroy & object_klass->finalize to point to our
	implementation. Also remove unused variables
	(nautilus_index_panel_initialize,
	nautilus_index_panel_set_up_label).

	* libnautilus/nautilus-background.c, src/ntl-window-msgs.c,
	src/ntl-window.c, src/file-manager/fm-directory-icons.c: Remove
	unused variables.

	* src/ntl-window.h: Add a variable (unused) for future handling of content view loading.

	* libnautilus/libnautilus.h: Add an interim g_alloca.

	* libnautilus/nautilus-directory.c: Clean up a bit further, by
	removing the need for another if(), and using g_alloca instead of
	g_malloc.