modules/sca: fix 180 replies in sca_call_info_invite_reply_18x_handler()

    - Per Broadworks Release 13.0v1 documentation, 180s should produce
      "appearance-state=progressing" just like 183s do; Polycom OS 3.3.4
      doesn't care, but 4.x swaps leg information when it hears
      "appearance-state=alerting"
    - report and patch from  Joao Vitor Arruda

modules/sca/sca_call_info.c

@@ -1072,9 +1072,6 @@ sca_call_info_invite_reply_18x_handler( sip_msg_t *msg,
 
     switch ( msg->REPLY_STATUS ) {
     case 180:
-	state = SCA_APPEARANCE_STATE_ALERTING;
-	break;
-
     case 183:
 	state = SCA_APPEARANCE_STATE_PROGRESSING;
 	break;