Set some sane defaults so as not to get "Non-positive period." error when trying to start the ping timer.

Change-Id: I6a0f9b362087677004f0ea21c5841f2eef15d04b
Reviewed-on: http://gerrit.dmdirc.com/2271
Reviewed-by: Chris Smith <chris@dmdirc.com>
Automatic-Compile: DMDirc Build Manager

src/com/dmdirc/parser/irc/IRCParser.java

@@ -287,6 +287,8 @@ public class IRCParser extends BaseParser implements SecureParser, EncodingParse
         }
 
         setIgnoreList(new IgnoreList());
+        setPingTimerInterval(10000);
+        setPingTimerFraction(6);
         resetState();
     }