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Add a sanity check to prevent the crash noted in #7654.
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@39212 a592a061-630c-0410-9148-cb99ea01b6c8
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@ -1249,7 +1249,11 @@ void Text::acceptOrRejectChanges(Cursor & cur, ChangeOp op)
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pos_type left = (pit == begPit ? begPos : 0);
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pos_type right = (pit == endPit ? endPos : parSize);
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if (left == right)
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// there is no change here
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continue;
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if (op == ACCEPT) {
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pars_[pit].acceptChanges(left, right);
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} else {
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