* remote.c (remote_write_bytes): Add default case to switch

* remote.c (remote_write_bytes): Add default case to switch
initializing ``todo''. Ditto for ``nr_bytes''.
* top.c (catch_errors): Always initialize ``val''.
* solib.c (info_sharedlibrary_command): Handle bfd_get_arch_size
returning an unknown size.
* gdbtypes.c (count_virtual_fns): Always initialize ``vfuncs''.
* breakpoint.c (break_at_finish_at_depth_command_1): Initialise
extra_args to NULL.
(break_at_finish_command_1): Ditto.