fix crash when importing unsupported macro content, related fdo#59374

Change-Id: I960c8174454074fd9ddb27fb17244d782c4cb24c
don't crash in mixed reference/no reference cases, related fdo#59853

Change-Id: Iecb4841dae5f5df28c697e1ea9998251d9975b5d
glx 1.3 is already supported in out base line

Change-Id: I4304368ebb5f40cb946290a717240143f845e0c9
until we support custUnit make sure that all files are valid

Change-Id: I759a4cc97e2a2adf71322d2aa18fdb11873a538e
prevent invalid OOXML chart files

Change-Id: I2ccf988a26e5c69f4f14547cfea7cb4fb574b317