* defs.h (struct gdbarch): Add forward declaration.

	* defs.h (struct gdbarch): Add forward declaration.
	(set_next_address): Add GDBARCH argument.
	* printcmd.c (set_next_address): Use it to find pointer type.
	* breakpoint.c (breakpoint_1): Update call.
	* source.c (line_info): Likewise.
	* findcmd.c (find_command): Use current_gdbarch to find pointer type.

	* breakpoint.c (set_breakpoint_count): Use platform-neutral
	types for internal variable values.
	* infrun.c (handle_inferior_event): Likewise.
	* source.c (forward_search_command, reverse_search_command): Likewise.
	* tracepoint.c (set_tracepoint_count, set_traceframe_num,
	set_tracepoint_num, set_traceframe_context): Likewise.