reset onelabStop!

contrib/mobile/drawContext.cpp

@@ -856,6 +856,7 @@ int onelab_cb(std::string action)
   } while(action == "compute" && !onelabStop && (onelabUtils::incrementLoop("3") ||
                                                  onelabUtils::incrementLoop("2") ||
                                                  onelabUtils::incrementLoop("1")));
+  onelabStop = false;
   locked = false;
   return onelab::server::instance()->getChanged();
 }