While talking to Austin he noted that the docs for the number of parameters
is actually an unsigned integer.
This patch corrects that.
See
1. Parameter format codes count (line 4323) — read at postgres.c:1725
2. Parameter values count (line 4348) — read at postgres.c:1734
3. Result-column format codes count (line 4396) — read at postgres.c:2017
Dave Cramer