Fix bug if using an undefined member of an object for for..in (fix #1437)
void jspSetNoExecute() {
  execInfo.execute = (execInfo.execute & (JsExecFlags)(int)~EXEC_RUN_MASK) | EXEC_NO;
}

void jspSetNoExecute() {
  execInfo.execute = (execInfo.execute & (JsExecFlags)(int)~EXEC_RUN_MASK) | EXEC_NO;
}
