[Sqlrelay-discussion] compilation fix for when compiling with odbc on 64-bit

[Petros M. <ern...@ya...>]

In newer unixODBC releases the SQLROWSETSIZE type has been commented out
as 'unsupported' for 64-bit and compilation of sqlrelay fails. In the
hope that this does not have any side-effects, the attached patch file
changes this to SQLULEN.