Toomas Soome 20698d1531 loader: bioscd probe can get sector size 0
With buggy BIOS, it may happen we get sector size reported 0 for cd, and then
the default 512 is used, which is quite wrong.

PR:		238749
2020-01-09 21:21:08 +00:00
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2019-06-25 04:50:09 +00:00
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