[logback-dev] [qos-ch/logback] 54fb9a: fix compiler warnings

[Ceki Gulcu]

  Branch: refs/heads/master
  Home:   https://github.com/qos-ch/logback
  Commit: 54fb9a62630081b4f1166cdbc6169f6d084f7ad4
      https://github.com/qos-ch/logback/commit/54fb9a62630081b4f1166cdbc6169f6d084f7ad4
  Author: Ceki Gulcu <ceki at qos.ch>
  Date:   2016-03-24 (Thu, 24 Mar 2016)

  Changed paths:
    M logback-core/src/main/java/ch/qos/logback/core/spi/AbstractComponentTracker.java

  Log Message:
  -----------
  fix compiler warnings