BUG: fix out of bounds access of array

address 3 coverity issues related to accessing m_Visitors out of
bounds.

CID 1081041 (#4-1 of 4): Out-of-bounds read (OVERRUN)
3. overrun-local: Overrunning array of 9 8-byte elements at element
index 9 (byte offset 72) by dereferencing pointer "&this->m_Visitors[id]"

Change-Id: Idf7e306c489a30e429ceff74d61849d5bbdb664f
Merge topic 'coverity_cid_1081041_53_57'

6149847 BUG: fix out of bounds access of array