Fix stopping when the specified breakpoint count is reached. The

countdown was done correctly, but the action when the count was not
reduced to 0 was to fall through to generic code which almost always
stopped.

sys/ddb/db_run.c

@@ -125,6 +125,7 @@ db_stop_at_pc(bool *is_breakpoint)
 		*is_breakpoint = true;
 		return (true);	/* stop here */
 	    }
+	    return (false);	/* continue the countdown */
 	} else if (*is_breakpoint) {
 #ifdef BKPT_SKIP
 		BKPT_SKIP;