lms: Fix stream_stats checks with overrun/underrun

It was initially thought that underruns/overrun fields were
increasing-over-time values.
However, after reading LimeSuite code, it seems overrun and
underrun fields are actually reset upon every call to
LMS_GetStreamStatus().

Related: osmo-trx.git 928177125654c1e596ec3450a68882c031ebb929
Related: https://github.com/myriadrf/LimeSuite/issues/265
Change-Id: I677232a7b12ee83d26aa34d92f76a91d4b5a63a6
1 file changed