* dbus/dbus-marshal.c (_dbus_demarshal_int32): rewrite to be much
	more inlined, using dbus-string-private.h, speeds things up
	substantially

	* dbus/dbus-string.c (_dbus_string_free): apply align offset
	when freeing the string
	(_dbus_string_steal_data): fix for align offset
	(undo_alignment): new function