PN5180ISO15693::getInventoryMultiple() causes stack overflow if any card in range has a UID that ends in x0

[mjmeans]

I was seeing hangs and an eventual stack overflow randomly when testing this function. After testing several dozen tags in various stacks.

All the tags I have tested have UIDs that start with the same 3 bytes. Most have the same 4th byte. Out of 3 dozen or so tags only 3 cause the problem if they are within range of the sensor. And all of the tags that cause the issue have UIDs ending in 0.

The hang also happens when a tag with a UID ending 0 is the only tag in range of the sensor.

My suspicion is that this is caused by a bug in the implementation of the collision avoidance algorithm.