fix endless loop

git-svn-id: http://svn.openzap.org/svn/openzap/trunk@642 a93c3328-9c30-0410-af19-c9cd2b2d52af

libs/freetdm/src/isdn/Q931mes.c

@@ -600,6 +600,9 @@ L3INT Q931Umes_Notify(Q931_TrunkInfo_t *pTrunk, L3UCHAR *IBuf, Q931mes_Generic *
 			if (rc != Q931E_NO_ERROR) 
 				return rc;
 			break;
+		default:
+			return Q931E_ILLEGAL_IE;
+			break;
 		}
 	}