master (trunk?) not compilable

[Kornel Benko]

This is on ubuntu 12.04

...
cd /usr/BUILD/BuildLyxGit/src/frontends/qt4 && /usr/bin/c++   -DUSE_ENCHANT=1 
-DQT_GENUINE_STR -DLYX_BUILD_QT4_FRONTEND -Wall -Wunused-parameter 
-fno-strict-aliasing  -Wall -Wunused-parameter -O3 -DNDEBUG 
-I/usr/BUILD/BuildLyxGit -I/usr/src/lyx/lyx-git/src -I/usr/include/enchant 
-I/usr/src/lyx/lyx-git/po -I/usr/src/lyx/lyx-git/boost 
-I/usr/src/lyx/lyx-git/src/frontends -I/usr/src/lyx/lyx-git/src/frontends/qt4 
-I/usr/include/qt4 -I/usr/include/qt4/Qt -I/usr/share/qt4/mkspecs/default 
-I/usr/include/qt4/QtCore -I/usr/include/qt4/QtGui 
-I/usr/include/qt4/Qt3Support -I/usr/include/qt4/QtDesigner 
-I/usr/include/qt4/QtNetwork -I/usr/include/qt4/QtOpenGL 
-I/usr/include/qt4/QtSql -I/usr/include/qt4/QtXml -I/usr/include/qt4/QtSvg 
-I/usr/include/qt4/QtUiTools -I/usr/include/qt4/QtTest 
-I/usr/BUILD/BuildLyxGit/src/frontends/qt4    -DBOOST_USER_CONFIG="<config.h>" 
-o CMakeFiles/frontend_qt4.dir/GuiWorkArea.cpp.o -c 
/usr/src/lyx/lyx-git/src/frontends/qt4/GuiWorkArea.cpp
/usr/src/lyx/lyx-git/src/frontends/qt4/GuiWorkArea.cpp: In member function 
‘virtual void lyx::frontend::TabWorkArea::paintEvent(QPaintEvent*)’:
/usr/src/lyx/lyx-git/src/frontends/qt4/GuiWorkArea.cpp:1566:3: error: 
‘QStylePainter’ was not declared in this scope
/usr/src/lyx/lyx-git/src/frontends/qt4/GuiWorkArea.cpp:1566:17: error: expected 
‘;’ before ‘p’
/usr/src/lyx/lyx-git/src/frontends/qt4/GuiWorkArea.cpp:1572:3: error: ‘p’ was 
not declared in this scope
make[2]: *** [src/frontends/qt4/CMakeFiles/frontend_qt4.dir/GuiWorkArea.cpp.o] 
Error 1
make[2]: Leaving directory `/usr/BUILD/BuildLyxGit'
make[1]: *** [src/frontends/qt4/CMakeFiles/frontend_qt4.dir/all] Error 2
make[1]: Leaving directory `/usr/BUILD/BuildLyxGit'
make: *** [all] Error 2
...
class QStylePainter defined in "/usr/include/qt4/Qt/qstylepainter.h", which is 
included by "/usr/include/qt4/Qt/QtGui"

        Kornel
diff --git a/src/frontends/qt4/GuiWorkArea.cpp b/src/frontends/qt4/GuiWorkArea.cpp
index 362f062..aa39f99 100644
--- a/src/frontends/qt4/GuiWorkArea.cpp
+++ b/src/frontends/qt4/GuiWorkArea.cpp
@@ -70,6 +70,7 @@
 #include <QToolButton>
 #include <QToolTip>
 #include <QMenuBar>
+#include <QtGui>
 
 #include "support/bind.h"
 

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