coverity#1294408 Logically dead code
coverity#1294408 Logically dead code

pre recent refactor pBox was assigned NULL
on the now early return pLines->empty() path

Change-Id: I6ecb31afc7a70fd5e11ff474145fd0e73dc33cef

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