[LyX/master] #11747 follow-up of change d94b708a0fec6ade04fc9d09bd86afd73e72fac7 to fix a compiler warning

[Stephan Witt]

commit 0885098bd3c07ca71024c4fe1bc7d6a1879918f6
Author: Stephan Witt <switt at lyx.org>
Date:   Sun Mar 8 13:33:02 2020 +0100

    #11747 follow-up of change d94b708a0fec6ade04fc9d09bd86afd73e72fac7 to fix a compiler warning
---
 src/mathed/InsetMathRef.cpp |    2 +-
 src/mathed/InsetMathRef.h   |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/mathed/InsetMathRef.cpp b/src/mathed/InsetMathRef.cpp
index 717bd41..62b3341 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*/)
+void InsetMathRef::updateBuffer(ParIterator const & it, UpdateType /*utype*/, bool /*deleted*/)
 {
 	if (!buffer_) {
 		LYXERR0("InsetMathRef::updateBuffer: no buffer_!");
diff --git a/src/mathed/InsetMathRef.h b/src/mathed/InsetMathRef.h
index 204e9c4..cdcbb1c 100644
--- a/src/mathed/InsetMathRef.h
+++ b/src/mathed/InsetMathRef.h
@@ -27,7 +27,7 @@ public:
 	///
 	explicit InsetMathRef(Buffer * buf, docstring const & data);
 	///
-	void updateBuffer(ParIterator const &, UpdateType);
+	void updateBuffer(ParIterator const &, UpdateType, bool const deleted = false);
 	///
 	//void write(WriteStream & os) const;
 	///