FS-3986 --resolve regression from 8f8af383

src/mod/endpoints/mod_sofia/sofia_presence.c

@@ -2500,7 +2500,9 @@ static int sofia_presence_sub_callback(void *pArg, int argc, char **argv, char *
 		}
 
 		if (zstr(uuid)) {
-			stream.write_function(&stream, "<state>terminated</state>\n");
+			if (stream.write_function) {
+				stream.write_function(&stream, "<state>terminated</state>\n");
+			}
 		} else {
 			if (!zstr(answer_state)) {
 				astate = answer_state;