Calculate proper size of menu list dialog

svn path=/head/; revision=309990

usr.sbin/bsdinstall/scripts/wlanconfig

@@ -224,6 +224,8 @@ while :; do
 	f_dialog_title "Network Selection"
 	prompt="Select a wireless network to connect to."
 	menu_list=$( echo $NETWORKS | tr '\n' ' ' )
+	f_dialog_menu_size height width rows "$DIALOG_TITLE" \
+		"$DIALOG_BACKTITLE" "$prompt" "" $menu_list
 	NETWORK=$( eval $DIALOG \
 		--title \"\$DIALOG_TITLE\"         \
 		--backtitle \"\$DIALOG_BACKTITLE\" \