XMLTextParagraphExport: not finding auto style means data loss
XMLTextParagraphExport: not finding auto style means data loss

... so use assert() to get attention for such problems.

Change-Id: I4aea1a1cb5ad497583024b326f27fb73e5be9bb7

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