svx: speed up ObjectContactOfPageView in case there is nothing to display
svx: speed up ObjectContactOfPageView in case there is nothing to display

Reviewed on:
	https://gerrit.libreoffice.org/8675

Change-Id: I8d797acb3ca9e2341c5db08b2fc409a3cd97635e

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