SwPageFrm::IsOverHeaderFooterArea: check for IsActive() only later

Checking for a bool is certainly cheaper than a chain of member function
calls.

Change-Id: I9520194e58e75264f3fcbb413a618e3995f59a4e

sw/source/core/layout/pagechg.cxx

@@ -2262,10 +2262,10 @@ bool SwPageFrm::IsOverHeaderFooterArea( const Point& rPt, FrameControlType &rCon
            Size( Frm().Width(), nUpperLimit - Frm().Top() ) );
 
     SwViewShell* pViewShell = getRootFrm()->GetCurrShell();
-    bool bHideWhitespaceMode = pViewShell->GetViewOptions()->IsHideWhitespaceMode();
+    const bool bHideWhitespaceMode = pViewShell->GetViewOptions()->IsHideWhitespaceMode();
     if ( aHeaderArea.IsInside( rPt ) )
     {
-        if (static_cast<const SwFrameFormat*>(GetRegisteredIn())->GetHeader().IsActive() || !bHideWhitespaceMode)
+        if (!bHideWhitespaceMode || static_cast<const SwFrameFormat*>(GetRegisteredIn())->GetHeader().IsActive())
         {
             rControl = Header;
             return true;
@@ -2277,7 +2277,7 @@ bool SwPageFrm::IsOverHeaderFooterArea( const Point& rPt, FrameControlType &rCon
                 Size( Frm().Width(), Frm().Bottom() - nLowerLimit ) );
 
         if ( aFooterArea.IsInside( rPt ) &&
-             (static_cast<const SwFrameFormat*>(GetRegisteredIn())->GetFooter().IsActive() || !bHideWhitespaceMode) )
+             (!bHideWhitespaceMode || static_cast<const SwFrameFormat*>(GetRegisteredIn())->GetFooter().IsActive()) )
         {
             rControl = Footer;
             return true;