[LyX/master] Fix declaration

[Richard Kimberly Heck]

commit c94a97e36c6ad00df273205f9e03fff624e084ef
Author: Richard Kimberly Heck <rikiheck at lyx.org>
Date:   Sun Apr 26 03:37:03 2020 -0400

    Fix declaration
---
 src/mathed/InsetMathRef.cpp |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/src/mathed/InsetMathRef.cpp b/src/mathed/InsetMathRef.cpp
index 62b3341..6a911af 100644
--- a/src/mathed/InsetMathRef.cpp
+++ b/src/mathed/InsetMathRef.cpp
@@ -203,7 +203,7 @@ int InsetMathRef::docbook(odocstream & os, OutputParams const & runparams) const
 }
 
 
-void InsetMathRef::updateBuffer(ParIterator const & it, UpdateType /*utype*/, bool /*deleted*/)
+void InsetMathRef::updateBuffer(ParIterator const & it, UpdateType /*utype*/, bool const /*deleted*/)
 {
 	if (!buffer_) {
 		LYXERR0("InsetMathRef::updateBuffer: no buffer_!");