Merge branch 'qt-4.7-from-4.6' of scm.dev.nokia.troll.no:qt/qt-integration into 4.7-integration

* 'qt-4.7-from-4.6' of scm.dev.nokia.troll.no:qt/qt-integration: (73 commits)
  Apply Rhys's fix to qpaintengine_vg.cpp to make it compile
  Attempt again at fixing the OpenVG paint engine build
  Revert "Attempt at fixing compile failure introduced by 4.6 merge in qpaintengine_vg.cpp"
  Attempt at fixing compile failure introduced by 4.6 merge in qpaintengine_vg.cpp
  Fixing the wrong QUrl usage
  When on Symbian use smaller files.
  correctly position glyphs for complex languages
  Removed inneccessary QGlyphLayout::offsets initialization.
  Fix mirrored characters for RTL text in Symbian
  QNAM: Add a code comment related to the cache
  tst_QSystemSemaphore::processes fixed for WinCE
  tst_qsystemsemaphore: fix deployment of lackey.exe for WinCE
  tst_qsharedmemory: create multiple instances of lackey.exe on WinCE
  tst_qsharedmemory: fix deployment of lackey.exe for WinCE
  fix compilation of tst_sharedmemory on Windows CE
  QtScript: regression with instanceof operator for QMetaObject wrappers
  examples/widgets/stylesheet fix mainwindow.ui
  QStyleSheetStyle: fix memory leak on base style change
  QNAM HTTP: Fixed a bug when getting empty files with pipelining
  Fix window transparency on Symbian.
  ...

1 files changed, 6 insertions, 7 deletions

diff --git a/src/corelib/io/qiodevice.cpp b/src/corelib/io/qiodevice.cpp
index f2cef4e1..bb11d6b 100644
--- a/src/corelib/io/qiodevice.cpp
+++ b/src/corelib/io/qiodevice.cpp
@@ -755,7 +755,6 @@ qint64 QIODevice::bytesToWrite() const
 qint64 QIODevice::read(char *data, qint64 maxSize)
 {
     Q_D(QIODevice);
-    CHECK_READABLE(read, qint64(-1));
 
 #if defined QIODEVICE_DEBUG
     printf("%p QIODevice::read(%p, %d), d->pos = %d, d->buffer.size() = %d\n",
@@ -786,13 +785,13 @@ qint64 QIODevice::read(char *data, qint64 maxSize)
     do {
         // Try reading from the buffer.
         int lastReadChunkSize = d->buffer.read(data, maxSize);
-        *d->pPos += lastReadChunkSize;
-        readSoFar += lastReadChunkSize;
-        // fast exit when satisfied by buffer
-        if (lastReadChunkSize == maxSize && !(d->openMode & Text))
-            return readSoFar;
-
         if (lastReadChunkSize > 0) {
+            *d->pPos += lastReadChunkSize;
+            readSoFar += lastReadChunkSize;
+            // fast exit when satisfied by buffer
+            if (lastReadChunkSize == maxSize && !(d->openMode & Text))
+                return readSoFar;
+
             data += lastReadChunkSize;
             maxSize -= lastReadChunkSize;
 #if defined QIODEVICE_DEBUG