fdo#33393 - tentative workaround for autosave image loss
fdo#33393 - tentative workaround for autosave image loss

cf. lengthy analysis in the bug, this appears to merit wider testing
for 3.5.1 RC1 and wouldn't be sensible without that, so commit early.

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