BLE ctlr - Fix maybe-uninitialized warning.
BLE ctlr - Fix maybe-uninitialized warning.

This warning was only getting reported with the "debug" profile (-O1).

X-Original-Commit: 7f8109d3330187668b722d5c53fcfa5258176c08

apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble