Add a sanity check to prevent the crash noted in #7654.

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/branches/BRANCH_2_0_X@39213 a592a061-630c-0410-9148-cb99ea01b6c8

diff --git a/src/Text.cpp b/src/Text.cpp
index 7da48185c80f07bd0f2b9ffdc55f9daecf1fe7a4..7cf206005e541044f9716747c16ff4c8b1b928e7 100644 (file)
--- a/src/Text.cpp
+++ b/src/Text.cpp
@@ -1250,7 +1250,11 @@ void Text::acceptOrRejectChanges(Cursor & cur, ChangeOp op)
 
                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 {