zsh:g{log,stash}: Drop tput for stty for size

As stty is part of POSIX and thus better available.

.config/zsh/autoload/glog

@@ -108,7 +108,9 @@ local -a fzf_args=(
 # 0.45 seems to be round about the ratio between cols and lines on my system.
 # With that I get somewhat decent results with. This probably depends on the
 # font and font-size of the terminal and needs to be changed potentially.
-if (( $(tput cols) * 0.4 > $(tput lines) )); then
+local -a tty_size
+tty_size=(${=$(command stty size 2>/dev/null)})
+if (( ! $? )) && (( $tty_size[2] * 0.4 > $tty_size[1] )); then
 	fzf_args+=(--preview-window=right)
 else
 	fzf_args+=(--preview-window=down)