[LyX/master] Fix nullptr warnings

[Richard Kimberly Heck]

commit 084baebbf9895a49b150e9d6a9b4338b1dd58cdd
Author: Richard Kimberly Heck <rikiheck at lyx.org>
Date:   Fri Feb 28 01:28:08 2020 -0500

    Fix nullptr warnings
---
 src/Compare.cpp |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/Compare.cpp b/src/Compare.cpp
index 214f25c..60a0b65 100644
--- a/src/Compare.cpp
+++ b/src/Compare.cpp
@@ -233,8 +233,8 @@ public:
 	Impl(Compare const & compare)
 		: abort_(false), n_(0), m_(0), offset_reverse_diagonal_(0),
 		  odd_offset_(0), compare_(compare),
-		  old_buf_(0), new_buf_(0), dest_buf_(0), dest_pars_(0),
-		  recursion_level_(0), nested_inset_level_(0), D_(0)
+		  old_buf_(nullptr), new_buf_(nullptr), dest_buf_(nullptr),
+		  dest_pars_(nullptr), recursion_level_(0), nested_inset_level_(0), D_(0)
 	{}
 
 	///