forked from amazingfate/loongoffice
RTF originally didn't support anchored pictures: they were always inline. Then it was invented that pictures can be exported anchored, if they are in fact shapes, but their "pib" property is set to the hexdump of the picture contents. The RTF importer handled this situation for quite some time, but not the exporter -- this commit implements that. Change-Id: I173ad9f4f2e24620508ca63c0b892b7d5da4e5b2