X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=src%2FUndo.h;h=70897bfa28fe336f21d428b27ea62c4708bed3af;hb=bd88740b065d312c2834701b410222e40009f623;hp=59f3ca44fc93a58975ee459ffc9440e5889a5ac1;hpb=cc241bdaaf0f63daf5e1afb4d8623a2f075943e5;p=lyx.git

diff --git a/src/Undo.h b/src/Undo.h
index 59f3ca44fc..70897bfa28 100644
--- a/src/Undo.h
+++ b/src/Undo.h
@@ -135,7 +135,7 @@ private:
  */
 class UndoGroupHelper {
 public:
-	UndoGroupHelper(Buffer * buf) : buffer_(0)
+	UndoGroupHelper(Buffer * buf = 0) : buffer_(0)
 	{
 		resetBuffer(buf);
 	}