[findbugs] Fix potential NPE in DiffStat generation

James Moger

2014-04-17 dfd6f5d75aebd7a0a41305831ec6d194ae092f5d

 src/test/java/com/gitblit/tests/mock/MockRuntimeManager.java

@@ -137,7 +137,7 @@
   }

   @Override
   public IRuntimeManager setup() {
   public IRuntimeManager start() {
      return this;
   }
}