WRITE_UINT_FIELD used where WRITE_OID_FIELD likely intended

At line 1787 of outfuncs.c, the line:
WRITE_UINT_FIELD(reltablespace)

should probably say
WRITE_OID_FIELD(reltablespace)

since that variable is of type Oid, not uint32.
Granted, these two macros are interchangeable,
but they won't be if we ever move to 64-bit Oids.

mark