Added extra method to check if any MSU transfer is configured, even if silent.

git-svn-id: http://voip.null.ro/svn/yate@4816 acf43c95-373e-0410-b603-e72c3f656dc1

libs/ysig/yatesig.h

@@ -6671,12 +6671,19 @@ public:
 	SS7MSU::Services part, unsigned char cause, const SS7Label& label, int sls);
 
     /**
-     * Check if the transfer function is enabled
-     * @return True if acting as a STP
+     * Check if the transfer function and STP management is enabled
+     * @return True if acting as a full STP
      */
     inline bool transfer() const
 	{ return m_transfer; }
 
+    /**
+     * Check if the messages are transferred even if STP management may be disabled
+     * @return True if messages are transferred between networks
+     */
+    inline bool transferring() const
+	{ return m_transfer || m_transferSilent; }
+
     /**
      * Check if the MTP is restarting
      * @return True if MTP restart procedure is in progress