* valops.c (find_overload_match): Call do_cleanups before early

	* valops.c (find_overload_match): Call do_cleanups before early
	return.
	* top.c (execute_command): Call do_cleanups before early return.
	(command_loop): Likewise.
	* stack.c (backtrace_command): Make a null cleanup early.  Don't
	conditionally call do_cleanups.
	* python/py-value.c (TRY_CATCH): Move cleanup handling into
	TRY_CATCH.
	* python/py-breakpoint.c (gdbpy_breakpoint_has_py_cond): Rearrange
	so cleanups are always run.
	* mi/mi-cmd-var.c (mi_cmd_var_delete): Reset old_cleanups.
	* findcmd.c (parse_find_args): Call do_cleanups on early return
	path.
	* dbxread.c (elfstab_build_psymtabs): Make a null cleanup early.
	Don't conditionally call do_cleanups.
	* cli/cli-script.c (execute_user_command): Initialize 'old_chain'
	later.