fixing some more 64bit bugs (bug report #1085384: "64-bit Pathfinder fails (crashes Mserver) with 64-bit oid's")
fixing some more 64bit bugs (bug report #1085384: "64-bit Pathfinder fails (crashes Mserver) with 64-bit oid's")

make sure, that BUNfnd on void-headed BATs get an oid pointer, not an int pointer
(dereferencing a 32-bit int pointer as a 64-bit oid is not what we want ...)

Remaining problems with XML output with 64bit oid's:
- closing tags are not printed for empty nodes
- in case of nested nodes, only the closing tag of the innermost
  node is printed, but all others are not

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