Fix docs.

Fix docs.

	* gtk/gtktreemodel.c (gtk_tree_row_reference_deleted): Fix docs.

	* gtk/gtkwindow.c (gtk_window_remove_mnemonic):
	(gtk_window_add_mnemonic):
	(gtk_window_mnemonic_activate): Add docs.

	* gtk/gtktreeview.c (gtk_tree_view_get_search_equal_func): Fix
	typo in docs.

	* test-loaders.c, test-images.h: More random tests.

	* io-bmp.c (DecodeHeader): Fail gracefully on OOM here.

	* gtk/gtk-sections.txt: Remove gtk_win32_get_installation_directory.