Fix rand-quote failure when site is unreachable

This plugin was designed so that if there is any failure, it will simply call itself recursively. Which means that if you were working offline, if `quote` was called in your `.zshrc`, you would be unable to open a new terminal session.

I fixed this by allowing the plugin to output nothing if a quote could not be fetched.

plugins/rand-quote/rand-quote.plugin.zsh

@@ -18,8 +18,8 @@ if [[ -x `which curl` ]]; then
         W=$(echo "$Q" | sed -e 's/.*\/quotes\///g' -e 's/<.*//g' -e 's/.*">//g')
         if [ "$W" -a "$TXT" ]; then
           echo "${WHO_COLOR}${W}${COLON_COLOR}: ${TEXT_COLOR}“${TXT}”${END_COLOR}"
-        else
-          quote
+        # else
+        #   quote
         fi
     }
     #quote