Merge branch '4.7' of scm.dev.nokia.troll.no:qt/oslo-staging-2 into 4.7-integration

* '4.7' of scm.dev.nokia.troll.no:qt/oslo-staging-2: (53 commits)
  removed a few warnings on wince builds
  Removed double setting of _WIN32_WINNT
  QTreeView: remove dead code.
  doc: Clarify effect of QFont::NoFontMerging
  Revert "Implement heightForWidth support for QTabWidget and QStackedLayout."
  build fix for S60
  Improve handling of QAction in soft key manager
  Remove useless assert
  qdrawhelper: fix optim in 2245641ba
  QSlider and StyleSheet: fix one pixel error while drawing the SliderAddPage
  accelerate QWindowsPipeWriter for bigger chunks of data
  Fix antialiasing with transformed text in OpenGL2 paint engine
  Fix flattening of largely scaled, thin, dashed beziers.
  Increased the precision used to flatten beziers
  Fix QT_NO_MOVIE
  Fix compile error with QT_NO_ACTION in QtGui
  Fix QT_NO_COMPLETER
  Fix QT_NO_FSCOMPLETER
  Fix QT_NO_FILESYSTEMMODEL
  Build fix
  ...

2 files changed, 12 insertions, 5 deletions

diff --git a/src/gui/text/qfont.cpp b/src/gui/text/qfont.cpp
index cb16a16..24887b5 100644
--- a/src/gui/text/qfont.cpp
+++ b/src/gui/text/qfont.cpp
@@ -1286,9 +1286,11 @@ QFont::StyleHint QFont::styleHint() const
     \value PreferAntialias antialias if possible.
     \value OpenGLCompatible forces the use of OpenGL compatible
            fonts.
-    \value NoFontMerging If a font does not contain a character requested
-           to draw then Qt automatically chooses a similar looking for that contains
-           the character. This flag disables this feature.
+    \value NoFontMerging If the font selected for a certain writing system
+           does not contain a character requested to draw, then Qt automatically chooses a similar
+           looking font that contains the character. The NoFontMerging flag disables this feature.
+           Please note that enabling this flag will not prevent Qt from automatically picking a
+           suitable font when the selected font does not support the writing system of the text.
 
     Any of these may be OR-ed with one of these flags:
 
diff --git a/src/gui/text/qfontdatabase_x11.cpp b/src/gui/text/qfontdatabase_x11.cpp
index b1ab478..3b2e4e9 100644
--- a/src/gui/text/qfontdatabase_x11.cpp
+++ b/src/gui/text/qfontdatabase_x11.cpp
@@ -1939,8 +1939,13 @@ void QFontDatabase::load(const QFontPrivate *d, int script)
             fe = loadFc(d, script, req);
 
             if (fe != 0 && fe->fontDef.pixelSize != req.pixelSize) {
-                delete fe;
-                fe = loadXlfd(d->screen, script, req);
+                QFontEngine *xlfdFontEngine = loadXlfd(d->screen, script, req);
+                if (xlfdFontEngine->fontDef.family == fe->fontDef.family) {
+                    delete fe;
+                    fe = xlfdFontEngine;
+                } else {
+                    delete xlfdFontEngine;
+                }
             }