[LyX/master] Fix compilation with MSVC 2015

[Guillaume Munch]

commit b40184ce7198e744ea5cdc2747a0e4d585709869
Author: Guillaume Munch <g...@lyx.org>
Date:   Sat Sep 24 00:50:03 2016 +0200

    Fix compilation with MSVC 2015
---
 src/TexRow.cpp |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/src/TexRow.cpp b/src/TexRow.cpp
index b4366e0..6f0e804 100644
--- a/src/TexRow.cpp
+++ b/src/TexRow.cpp
@@ -25,6 +25,7 @@
 #include "support/lassert.h"
 
 #include <algorithm>
+#include <iterator>
 #include <sstream>
 
 using namespace std;