patch 8.2.0857: GTK cell height can be a pixel too much Commit: https://github.com/vim/vim/commit/5cd1cb9ff9d04979ff4cbc36ca8416d83364505d Author: Bram Moolenaar <Bram@vim.org> Date: Sun May 31 13:53:04 2020 +0200 patch 8.2.0857: GTK cell height can be a pixel too much Problem: GTK cell height can be a pixel too much. Solution: Subtract 3 instead of 1 when rounding. (closes https://github.com/vim/vim/issues/6168)

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}\")