Fix out of bounds read on array used to seed hash table
Fix out of bounds read on array used to seed hash table

Running with ASAN found this problem, it just seems to be an off-by-one
error.

Change-Id: I9326fcaf87947fa211a5983acf6eb5a7365473d6
Reviewed-on: http://gerrit.cloudera.org:8080/170
Reviewed-by: Casey Ching <77bc9a9984e6786c5799d7a71768cf023120ef76@cloudera.com>
Tested-by: Internal Jenkins

ibmsoe/ImpalaPPC,ibmsoe/ImpalaPPC,ibmsoe/ImpalaPPC,ibmsoe/ImpalaPPC,ibmsoe/ImpalaPPC,ibmsoe/ImpalaPPC,ibmsoe/ImpalaPPC