plproxy - plproxy: proper quoting for function and result column names

Log Message:
-----------
proper quoting for function and result column names

Modified Files:
--------------
plproxy/src:
function.c (r1.4 -> r1.5)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plproxy/plproxy/src/function.c.diff?r1=1.4&r2=1.5)
plproxy.h (r1.8 -> r1.9)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plproxy/plproxy/src/plproxy.h.diff?r1=1.8&r2=1.9)
result.c (r1.2 -> r1.3)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plproxy/plproxy/src/result.c.diff?r1=1.2&r2=1.3)
type.c (r1.2 -> r1.3)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plproxy/plproxy/src/type.c.diff?r1=1.2&r2=1.3)