auc3g: officially wrap IND around IND_bitlen space

To determine distinct IND pools for each connected VLR, we need to pick ever
increasing values for any new peer showing up. Each subscriber's individual
IND_bitlen is then required to modulo the least significant N of bits that fit
in its IND_bitlen to effectively round-robin in the available IND pool space.
So far we did that but issued a warning message. This is actually exactly what
we want and it doesn't need to be treated like it weren't so.

Change-Id: I716d8a8a249235c8093d7a6a78b3535d893d867e
1 file changed