修复bug：李碧发现在初始化后，首次调用maat_cmd_set_lines会段错误，这是由于写redis句柄未进行初始化导致。

inc/Maat_command.h

@@ -120,7 +120,7 @@ struct Maat_line_t
 {
 	const char* table_name;
 	const char* table_line;
-	int rule_id;		// for MAAT_OP_DEL, only rule_id is necessary.
+	int rule_id;		// for MAAT_OP_DEL, only rule_id and table_name are necessary.
 	int label_id;
 	int expire_after;	//expired after $timeout$ seconds, set to 0 for never timeout.
 };