Improve const correctness.

diff --git a/src/mathed/MathExtern.cpp b/src/mathed/MathExtern.cpp
index d101904e83f97e01162c09ccdc0168497fceb615..b07c08b56e049cc58e7105a83c0aa37bfdf86eeb 100644 (file)
--- a/src/mathed/MathExtern.cpp
+++ b/src/mathed/MathExtern.cpp
@@ -295,7 +295,7 @@ bool testString(MathAtom const & at, char const * const str)
 // search end of nested sequence
 MathData::iterator endNestSearch(
        MathData::iterator it,
-       MathData::iterator last,
+       const MathData::iterator& last,
        TestItemFunc testOpen,
        TestItemFunc testClose
 )