iplookup plugin: fix brokage from IPv6 support

Commit ff949fe1c9dd0c179ecdce9340c04c05242d3a48 "iplookup plugin:
support IPv6 too" broke the main iplookup method by forgetting to
initialize reply correctly.

Fix it, and replace String#+= usage with String#<< which is more
efficient speed- and memory-wise.

1 files changed, 4 insertions, 3 deletions

diff --git a/data/rbot/plugins/iplookup.rb b/data/rbot/plugins/iplookup.rb
index c983b300..495aa614 100644
--- a/data/rbot/plugins/iplookup.rb
+++ b/data/rbot/plugins/iplookup.rb
@@ -188,20 +188,21 @@ class IPLookupPlugin < Plugin
   end
 
   def iplookup(m, params)
-    debug params
+    reply = ""
     if params[:domain].match(/^#{Regexp::Irc::HOSTADDR}$/)
       ip = params[:domain]
     else
       begin
         ip = Resolv.getaddress(params[:domain])
-        reply += "#{params[:domain]} | "
+        reply << "#{params[:domain]} | "
       rescue => e
         m.reply "#{e.message}"
         return
       end
     end
 
-    reply += ArinWhois.lookup_info(ip)
+    reply << ArinWhois.lookup_info(ip)
+
     m.reply reply
   end