On BigEndian build fails with:
[ 109s]
/home/abuild/rpmbuild/BUILD/mariadb-10.0.17/storage/cassandra/ha_cassandra.cc:890:22:
error: invalid conversion from 'longlong*
{aka long long int*}

' to 'long long int' [-fpermissive]
[ 109s] value->x.long_value= (longlong *)*cass_data;
[ 109s] ^

This commit fixes it
Signed-off-by: Dinar Valeev <dvaleev@suse.com>