Resolves fdo#43725 crash on saving a file
Resolves fdo#43725 crash on saving a file

+ Checks out-of-bounds accesses in
  ScFormatRangeStyles::GetStyleNameIndex() and
  ScRowFormatRanges::AddRange() and prevents crashes.
- The real cause seems to be some style row/repeat miscalculation
  elsewhere, further investigation would be necessary.

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