erlang: Don't print a warning for application-defined exceptions

Application-defined exceptions are a normal occurrence as far as the
Thrift infrastructure is concerned, so we should not print a warning.

git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@990967 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/lib/erl/src/thrift_processor.erl b/lib/erl/src/thrift_processor.erl
index e26fb33..913e59b 100644
--- a/lib/erl/src/thrift_processor.erl
+++ b/lib/erl/src/thrift_processor.erl
@@ -87,7 +87,7 @@
             ok;
 
         {throw, Exception} when is_tuple(Exception), size(Exception) > 0 ->
-            error_logger:warning_msg("~p threw exception: ~p~n", [Function, Exception]),
+            %error_logger:warning_msg("~p threw exception: ~p~n", [Function, Exception]),
             handle_exception(State, Function, Exception),
             ok;   % we still want to accept more requests from this client