This change
1.fixes the use of uninitialized
variable in host driver.
2.Adds validation in extract_roam_sync_frame_event_tlv
Where these frame lengths are getting populated,
also at the place where subtraction happens to prevent
overflows
3.Adds NULL check in wma_handle_roam_reason_deauth, to avoid
the null pointer dereference.
Change-Id: I2d5ba61fb109f6d8b497df29cfa2dd572c00adeb
CRs-Fixed: 3297792
d64cb46a9c