sw: do not paint hidden frames' borders

SwFrame::PaintSwFrameShadowAndBorder() is called by upper's
SwFrame::PaintSwFrameBackground() so it needs another check.

(regression from commit ff7f1b59e22092d8548459e75fe912db852f056f)

Change-Id: Ic7ac28e4af8e0abf4970d87edb40a79ad4d25156
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/177032
Tested-by: Jenkins
Reviewed-by: Michael Stahl <michael.stahl@allotropia.de>

sw/source/core/layout/paintfrm.cxx

@@ -5532,6 +5532,11 @@ void SwFrame::PaintSwFrameShadowAndBorder(
             return;
     }
 
+    if (!getFramePrintArea().HasArea())
+    { // hidden text frame, may be called by upper from PaintSwFrameBackground()
+        return;
+    }
+
     const bool bLine = rAttrs.IsLine();
     const bool bShadow = rAttrs.GetShadow().GetLocation() != SvxShadowLocation::NONE;