erlang: Fix several compilation warnings

git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@990999 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/lib/erl/src/thrift_processor.erl b/lib/erl/src/thrift_processor.erl
index 9924a2c..4315505 100644
--- a/lib/erl/src/thrift_processor.erl
+++ b/lib/erl/src/thrift_processor.erl
@@ -26,7 +26,7 @@
 
 -record(thrift_processor, {handler, protocol, service}).
 
-init({Server, ProtoGen, Service, Handler}) when is_function(ProtoGen, 0) ->
+init({_Server, ProtoGen, Service, Handler}) when is_function(ProtoGen, 0) ->
     {ok, Proto} = ProtoGen(),
     loop(#thrift_processor{protocol = Proto,
                            service = Service,