Shorten the zle check and reset-prompt into one line.

plugins/vi-mode/vi-mode.plugin.zsh

@@ -16,14 +16,7 @@ function zle-keymap-select zle-line-init zle-line-finish {
 
 # Ensure that the prompt is redrawn when the terminal size changes.
 TRAPWINCH() {
-  if [[ -o zle ]]; then
-    # Verify that zle is active before trying to reset-prompt.
-    zle
-    if [[ $? -eq 0 ]]; then
-      zle reset-prompt
-      zle -R
-    fi
-  fi
+  zle && { zle reset-prompt; zle -R }
 }
 
 zle -N zle-line-init