[LyX/master] Fix missing include for endl after header cleanup in change 670efa8f646218f2a378f0cc614c4c37a9f6b89a

[Stephan Witt]

commit d246aa7af5509f7e57f7c55a8ce2167462ea2ec5
Author: Stephan Witt <sw...@lyx.org>
Date:   Mon Jul 4 11:04:53 2016 +0200

    Fix missing include for endl after header cleanup in change 
670efa8f646218f2a378f0cc614c4c37a9f6b89a
---
 src/frontends/qt4/GuiWorkArea.cpp |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/src/frontends/qt4/GuiWorkArea.cpp 
b/src/frontends/qt4/GuiWorkArea.cpp
index dad7de4..c13beec 100644
--- a/src/frontends/qt4/GuiWorkArea.cpp
+++ b/src/frontends/qt4/GuiWorkArea.cpp
@@ -81,6 +81,7 @@
 #include "support/bind.h"
 
 #include <cmath>
+#include <iostream>
 
 int const TabIndicatorWidth = 3;