Update TekkitRestrict/src/com/github/dreadslicer/tekkitrestrict/TRListener.java

If there is an issue with config or getting UseItemLimiter from config, does not cause an error on login/logout.
Merge pull request #4 from Arrexel/patch-2

Update TekkitRestrict/src/com/github/dreadslicer/tekkitrestrict/TRListen...