TYPEMAP
projPJ O_OBJECT
OUTPUT
O_OBJECT
sv_setref_pv( $arg, "Geo::Proj4", (void*)$var );
INPUT
O_OBJECT
if( sv_isobject($arg) && (SvTYPE(SvRV($arg)) == SVt_PVMG) )
$var = ($type)SvIV((SV*)SvRV( $arg ));
else {
/* original version had a line break here that broke the code. */
warn( \"${Package}::$func_name() - $var is not a blessed reference\" );
XSRETURN_UNDEF;
}