QHeaderView - fix to resizeSection patch (Ia812a747)

A minor simple adjustment to the update-patch for resizeSection.
( http://codereview.qt-project.org/#change,11267 )

We can't just return and ignore that we might needed to call
d->doDelayedResizeSections

Just because the header does not have updates enabled does not
mean that the view hasn't updates enabled - and even in
that situation we actually still wanted to keep this.

(It is only if the parent is not visible we safe can/should
skip this - but I will look into that later)

Change-Id: I771de086a07d1e7612a6bfea132d4d15f277ceb3
Reviewed-by: Robin Burchell <robin+qt@viroteck.net>
Reviewed-by: Stephen Kelly <stephen.kelly@kdab.com>

src/widgets/itemviews/qheaderview.cpp

@@ -899,6 +899,8 @@ void QHeaderView::resizeSection(int logical, int size)
     d->createSectionSpan(visual, visual, size, d->headerSectionResizeMode(visual));
 
     if (!updatesEnabled()) {
+        if (d->hasAutoResizeSections())
+            d->doDelayedResizeSections();
         emit sectionResized(logical, oldSize, size);
         return;
     }