[LyX/master] Really use qstr to convert a string in a QString

[Richard Heck]

commit 54a534c81fe1ff344e4972303cc59aeaac9c6e1b
Author: Benjamin Piwowarski <bpiwo...@lyx.org>
Date:   Fri Mar 21 14:15:07 2014 +0100

    Really use qstr to convert a string in a QString

diff --git a/src/frontends/qt4/GuiView.cpp b/src/frontends/qt4/GuiView.cpp
index ce39a6e..4a4ab00 100644
--- a/src/frontends/qt4/GuiView.cpp
+++ b/src/frontends/qt4/GuiView.cpp
@@ -1006,7 +1006,7 @@ void GuiView::updateWindowTitle(GuiWorkArea * wa)
        // Sets the path for the window: this is used by OSX to 
        // allow a context click on the title bar showing a menu
        // with the path up to the file
-       
setWindowFilePath(toqstr(wa->bufferView().buffer().absFileName().c_str()));
+       setWindowFilePath(toqstr(wa->bufferView().buffer().absFileName()));
 #endif
 }