SwTextBoxHelper::create(): initialize size
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

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core