commit https://github.com/vim/vim/commit/1000565c3a2439c9a7c9759284814dbf3b8bc20d Author: Bram Moolenaar <Bram@vim.org> Date: Thu Dec 31 21:03:23 2015 +0100 patch 7.4.1012 Problem: Vim overwrites the value of $PYTHONHOME. Solution: Do not set $PYTHONHOME if it is already set. (Kazuki Sakamoto, closes https://github.com/vim/vim/issues/500)

TYPEMAP
VIWIN	T_VIOBJNOMUNGE
VIBUF	T_VIOBJNOMUNGE

INPUT
T_VIOBJNOMUNGE
	if (sv_isa($arg, \"${ntype}\")) {
	    IV tmp = SvIV((SV*)SvRV($arg));
	    $var = INT2PTR($type, tmp);
	    if (!tmp)
		croak(\"$ntype no longer exists\");
	}
	else
	    croak(\"$var is not of type ${ntype}\")