sd-ppt-fix-document-summary-reading.diff: crasher fix (bnc#546758)
sd-ppt-fix-document-summary-reading.diff: crasher fix (bnc#546758)

fix problem in ppt reading causing crash or memory saturation

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