fix minor bug

files/zsh/50-alias.zsh

@@ -10,6 +10,8 @@ alias cl='clear'
 alias ag='alias | grep'
 alias hg='history | grep'
 
+command_exists() { command -v "$@" >/dev/null 2>&1; }
+
 if command_exists iptables; then
     alias ipl='sudo iptables -L -n'
     if [ -f "/etc/network/if-pre-up.d/iptables-load" ]; then
@@ -18,8 +20,6 @@ if command_exists iptables; then
     fi
 fi
 
-command_exists() { command -v "$@" >/dev/null 2>&1; }
-
 command_exists trash-put && alias rm='trash-put'
 command_exists batcat && alias cat='batcat'
 command_exists fdfind && alias fd='fdfind'