make chan id parsing more flezible, seems to follow the spec still correctly.

git-svn-id: http://svn.openzap.org/svn/openzap/trunk@295 a93c3328-9c30-0410-af19-c9cd2b2d52af

libs/freetdm/src/isdn/Q931ie.c

@@ -1157,7 +1157,7 @@ L3INT Q931Uie_ChanID(Q931_TrunkInfo_t *pTrunk, Q931mes_Generic *pMsg, L3UCHAR *
     L3INT Off = 0;
     L3INT Octet = 0;
     L3INT IESize;
-
+//18 04 e1 80 83 01
     *pIE=0;
 
     /* Octet 1 */
@@ -1190,8 +1190,8 @@ L3INT Q931Uie_ChanID(Q931_TrunkInfo_t *pTrunk, Q931mes_Generic *pMsg, L3UCHAR *
         Off = Q931ReadExt(&IBuf[Octet+Off], Off);
         Off++;
     }
-    else
-    {
+
+    if (Octet + Off -2 != IESize) {
         /* Octet 3.2 */
         if(pie->IntType == 1)        /* PRI etc */
         {