1999-01-29 Martin Hunt <hunt@cygnus.com>

	Changes from Keith Seitz  <keiths@cygnus.com>

        * valops.c (value_assign): Add calls to register_changed_hook and
        memory_changed_hook to inform UIs that the user has changed
        the target's registers/memory.
        * findvar.c (write_register_gen): Remove call to pc_changed_hook.
        * defs.h: Remove declaration for pc_changed_hook and
        add declarations for register_changed_hook and
        memory_changed_hook.
        * top.c: Ditto.