Minor tidying

Change-Id: If6e8898bb70dfc6390267a8f8066d93bf844dc0a
Reviewed-on: http://gerrit.dmdirc.com/3688
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Greg Holmes <greg@dmdirc.com>

src/com/dmdirc/util/DateUtils.java

         seconds -= doDuration(buff, seconds, 60 * 60 * 24, "day");
         seconds -= doDuration(buff, seconds, 60 * 60, "hour");
         seconds -= doDuration(buff, seconds, 60, "minute");
-        seconds -= doDuration(buff, seconds, 1, "second");
+        doDuration(buff, seconds, 1, "second");
 
         return buff.length() == 0 ? "0 seconds" : buff.toString();
     }

src/com/dmdirc/util/io/ReverseFileReader.java

 
         final ArrayList<Byte> line = new ArrayList<>(seekLength);
         // Used to store position in file pre-read
-        long fp = 0;
+        long fp;
         // Used to store position in file when this is called
-        long startfp = 0;
+        long startfp;
         // Used to store read bytes
         byte[] bytes;
         // Distance seeked
-        int seekDistance = 0;
+        int seekDistance;
 
         // Check current position, if 0 we are at the start of the file
         // and should throw an exception.