client session BUGFIX check for parsing errors

Author: michalvasko

src/session_client.c

@@ -1841,6 +1841,9 @@ nc_send_rpc(struct nc_session *session, struct nc_rpc *rpc, int timeout, uint64_
         } else {
             data = lyd_parse_mem(session->ctx, rpc_gen->content.xml_str, LYD_XML, LYD_OPT_RPC | LYD_OPT_NOEXTDEPS
                                  | (session->flags & NC_SESSION_CLIENT_NOT_STRICT ? 0 : LYD_OPT_STRICT), NULL);
+            if (!data) {
+                return NC_MSG_ERROR;
+            }
         }
         break;