Fix bugs

zsh/preserve-cwd-ssh.zsh

@@ -1,11 +1,16 @@
 if [ "$PRESERVE_SSH_CWD" = "true" ]; then
-    if [ -z $TERMINAL_UUID ]; then
-        if [ -z $DISPLAY ]; then
+    if [ -z $DISPLAY ]; then
+        if [ -z $TERMINAL_UUID ]; then
             export TERMINAL_UUID=$(uuidgen)
-        else
-            WINDOW_ID=$(xdotool getactivewindow)
+        fi
+    else
+        WINDOW_ID=$(xdotool getactivewindow)
+
+        if [ $? -eq 0 ]; then
             WM_NAME=$(xprop -id $WINDOW_ID WM_NAME | cut -d '"' -f 2)
             export TERMINAL_UUID=$WM_NAME
+        else
+            export TERMINAL_UUID=$(uuidgen)
         fi
     fi
     echo -en "\e]2;$TERMINAL_UUID\a"