SQLGetInfo Bug

I've been working with Didier Moens to try to fix the bug detailed at
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=80394.

As I said towards the end, the error is caused by an overflow of the tmp buffer in PGAPI_GetInfo in info.c for which I
havecommitted a change doubling it's size to 256 bytes. I also tried using snprintf instead of sprintf for safety: 

snprintf(tmp, sizeof(tmp) - 1, "%s %s", POSTGRESDRIVERVERSION, conn->pg_version);

but somewhere along the way garbage is getting appended back on the string returned:

[328][SQLGetInfo][328]PGAPI_GetInfo: entering...fInfoType=18
[328]PGAPI_GetInfo: p='07.02.0005 PostgreSQL 7.3 on i386-redhat-linux-gnu, compiled by GCC i386-redhat-linux-gcc (GCC)
3.2.120021207 (Red Hat Linux 8wãF¸8Ù
', len=0, value=0, cbMax=0 

I can't see what the heck I've done wrong here. Any ideas?

Cheers, Dave.