patch 9.0.1037: lalloc(0) error for a class without members Commit: https://github.com/vim/vim/commit/98aeb2100c2759111f93f0f0857e93d98afdc88a Author: Bram Moolenaar <Bram@vim.org> Date: Thu Dec 8 22:09:14 2022 +0000 patch 9.0.1037: lalloc(0) error for a class without members Problem: lalloc(0) error for a class without members. Solution: Don't allocate room for members if there aren't any. Don't create the class if there was an error.

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}\")