Doc: corrected minor link issues

Task-number: QTBUG-43810
Change-Id: I98eafe0c7ed55f309640e8495c83ffcef355aa08
Reviewed-by: Martin Smith <martin.smith@theqtcompany.com>

src/corelib/tools/qhash.cpp

@@ -308,7 +308,7 @@ int qGlobalQHashSeed()
 /*! \relates QHash
     \since 5.6
 
-    Sets the global QHash seed.
+    Sets the global QHash seed to \a newSeed.
 
     Manually setting the global QHash seed value should be done only for testing
     and debugging purposes, when deterministic and reproducible behavior on a QHash

src/widgets/graphicsview/qgraphicswidget.cpp

@@ -306,6 +306,7 @@ void QGraphicsWidget::resize(const QSizeF &size)
     \fn void QGraphicsWidget::resize(qreal w, qreal h)
     \overload
 
+    Constructs a resize with the given \c width (\a w) and \c height (\a h).
     This convenience function is equivalent to calling resize(QSizeF(w, h)).
 
     \sa setGeometry(), setTransform()