Infinite loop when reading corrupt raw banks

When reading raw banks from an MDF file LHCb can enter an infinite loop.

Here is a single event MDF file (from Moore#785) which triggers the problem:

289233_00120016_0000.evt-404335.raw

And here is an annotated hex dump of the file:

https://cburr.web.cern.ch/Moore-697/289233_00120016_0000.evt-404335_event-1.html

I belive the problem is that LHCb doesn't:

• Ensure a raw bank starts with the magic bytes (0xcbcb)
• Ensure that the size of a raw bank is at least the size of the raw bank header

This causes the reading to get stuck in a loop where it keeps reading the same zero sized "raw bank" over and over again.