psqlodbc - psqlodbc: Use int instead of size_t when condition >=0 is

Log Message:
-----------
Use int instead of size_t when condition >=0 is used.

Modified Files:
--------------
psqlodbc:
convert.c (r1.199 -> r1.200)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/convert.c?r1=1.199&r2=1.200)
misc.c (r1.56 -> r1.57)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/misc.c?r1=1.56&r2=1.57)
version.h (r1.209 -> r1.210)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/psqlodbc/psqlodbc/version.h?r1=1.209&r2=1.210)