Fix warning in generated source for alterl bindings

Summary:
  - Was previously including both the fall-through to the base service as well as the "dummy" fallthrough function clause. This generated a warning like:

  gen-erl/redacted_thrift.erl:134: Warning: this clause cannot match because a previous clause at line 132 always matches

  Now we only include the "dummy" function if there is no base class to fall through to.

Test plan: Generated tutorial.thrift and shared.thrift, compiled without warnings

Notes: It's probably possible to have a circular inheritance graph, which would cause an infinite loop at runtime. Do we care about this?


git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@666423 13f79535-47bb-0310-9956-ffa450edef68
1 file changed