SwTextBoxHelper::create(): initialize size

On import, syncProperty() takes care of this, but in case the user
interactively adds a textbox, when we need to handle the size in
create() as well.

Change-Id: I9428a682dbf70550bdfd081900e8098aeb64d38f

sw/source/core/doc/textboxhelper.cxx

@@ -66,6 +66,10 @@ void SwTextBoxHelper::create(SwFrmFmt* pShape)
             aSet.Put(aCntnt);
             pShape->SetFmtAttr(aSet);
         }
+
+        // Also initialize the properties, which are not constant, but inherited from the shape's ones.
+        uno::Reference<drawing::XShape> xShape(pShape->FindRealSdrObject()->getUnoShape(), uno::UNO_QUERY);
+        syncProperty(pShape, RES_FRM_SIZE, MID_FRMSIZE_SIZE, "Size", uno::makeAny(xShape->getSize()));
     }
 }