patch 8.0.1621: using invalid default value for highlight attribute commit https://github.com/vim/vim/commit/6185903e3d07eb53326fc1403fc2de97ca31b775 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Mar 20 13:00:25 2018 +0100 patch 8.0.1621: using invalid default value for highlight attribute Problem: Using invalid default value for highlight attribute. Solution: Use zero instead of -1.

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}\")