SwXStyleFamily::getPropertySetInfo: remove useless OSL_FAIL
SwXStyleFamily::getPropertySetInfo: remove useless OSL_FAIL

When poking around using an xray-like tool, it's quite expected that
this method is reached.

Change-Id: Ie795bbb06df740d853065d21c838e10a55ff34c6

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