wlan: Check if adapter is null or its magic is invalid

Check if adapter is null or its magic is invalid in
function hdd_softap_DeregisterSTA before accessing it

CRs-Fixed: 483633
Change-Id: I6d3383429159b12bd21b429095da7512c8e762f6
1 file changed
tree: 5af07eb92cccbddac562bee1fbc2f6be9611fc5e
  1. CORE/
  2. firmware_bin/
  3. riva/
  4. Android.mk
  5. Kbuild
  6. Kconfig