fixing two more bugs in XRpc: - to read/access the tail value of a BUN,   we should use BUNtail (not just BUNptr). - BAT int_values is [void,lng], hence the tail type   is TYPE_lng, not TYPE_int.
fixing two more bugs in XRpc:
- to read/access the tail value of a BUN,
  we should use BUNtail (not just BUNptr).
- BAT int_values is [void,lng], hence the tail type
  is TYPE_lng, not TYPE_int.

zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb