Re: SPI bug.

Neil Conway wrote:
> I think changing SPI_cursor_fetch() and SPI_cursor_move() to take a
> "long" for the "count" parameter is the right fix for HEAD.

Attached is a patch that implements this. A bunch of functions had to be
updated: SPI_execute(), SPI_execute_snapshot(), SPI_exec(), SPI_execp(),
SPI_execute_plan(), SPI_cursor_fetch(), and SPI_cursor_move().

I also updated PL/Python, which was invoking SPI_execute() with an `int'
parameter. PL/Tcl could be updated as well, but it seems the base Tcl
package doesn't provide a Tcl_GetLong() function. PL/Perl could also be
updated (plperl_spi_exec()), but I don't know XS, so I will leave that
to someone else.

Barring any objections, I'll apply this to HEAD tomorrow.

-Neil