Fix encoding of Call State IE, Q.931 (05/98) 4.5.7: bit 8 of octet 3 is part of the coding standard

git-svn-id: http://svn.openzap.org/svn/openzap/trunk@751 a93c3328-9c30-0410-af19-c9cd2b2d52af

libs/freetdm/src/isdn/Q931ie.c

@@ -557,7 +557,7 @@ L3INT Q931Pie_CallState(Q931_TrunkInfo_t *pTrunk, L3UCHAR *IBuf, L3UCHAR *OBuf,
 	OBuf[(*Octet)++] = Q931ie_CALL_STATE;
 	li = (*Octet)++; /* remember length position */
 
-	OBuf[(*Octet)++] = 0x80 | (pIE->CodStand<<6) | pIE->CallState;
+	OBuf[(*Octet)++] = (pIE->CodStand << 6) | (pIE->CallState & 0x3f);
 
 	OBuf[li] = (L3UCHAR)((*Octet) - Beg) - 2;
 	return rc;