asr result in mrcp message body must be checked to exist before use

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@5633 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/asr_tts/mod_openmrcp/mod_openmrcp.c

@@ -487,6 +487,7 @@ static switch_status_t openmrcp_asr_get_results(switch_asr_handle_t *ah, char **
           </result>
 		*/
 
+		if(asr_session->mrcp_message_last_rcvd && asr_session->mrcp_message_last_rcvd->body) {
 			char *marker = "?>";  // FIXME -- lame and brittle way of doing this.  use regex or better.
 			char *position = strstr(asr_session->mrcp_message_last_rcvd->body, marker);
 			if (!position) {
@@ -497,6 +498,11 @@ static switch_status_t openmrcp_asr_get_results(switch_asr_handle_t *ah, char **
 				position += strlen(marker);
 				*xmlstr = strdup(position);
 			}
+		}
+		else {
+			switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "No result received from mrcp server: %s");
+			ret = SWITCH_STATUS_FALSE;
+		}
 
 		// since we are returning our result here, future calls to check_results
 		// should return False