// of this document. For example, when you apply class article to a beamer document,
// all unknown layouts such as frame will be added to document class article so that
// these layouts can keep their original names.
- tclass.addLayoutIfNeeded(layoutname);
bool const added_one = tclass.addLayoutIfNeeded(layoutname);
if (added_one) {
// Warn the user.
pos_type left = (pit == begPit ? begPos : 0);
pos_type right = (pit == endPit ? endPos : parSize);
-
+
+ if (left == right)
+ // there is no change here
+ continue;
+
if (op == ACCEPT) {
pars_[pit].acceptChanges(left, right);
} else {