Show user prompt in gnzh theme regardless of UID

Fixes #2008.

themes/gnzh.zsh-theme

@@ -14,11 +14,11 @@ eval PR_NO_COLOR="%{$terminfo[sgr0]%}"
 eval PR_BOLD="%{$terminfo[bold]%}"
 
 # Check the UID
-if [[ $UID -ge 1000 ]]; then # normal user
+if [[ $UID -ne 0 ]]; then # normal user
   eval PR_USER='${PR_GREEN}%n${PR_NO_COLOR}'
   eval PR_USER_OP='${PR_GREEN}%#${PR_NO_COLOR}'
   local PR_PROMPT='$PR_NO_COLOR➤ $PR_NO_COLOR'
-elif [[ $UID -eq 0 ]]; then # root
+else # root
   eval PR_USER='${PR_RED}%n${PR_NO_COLOR}'
   eval PR_USER_OP='${PR_RED}%#${PR_NO_COLOR}'
   local PR_PROMPT='$PR_RED➤ $PR_NO_COLOR'