THRIFT-214. cpp: Qualify a cast to fix OSX compilation

id_t is defined in some OSX header, and the id_t in this function
resolved to that one instead of Thread::id_t.  This change fully
qualifies the type to make sure it resolves properly.

Also remove a comment about eliminating the C-style cast, since it
is actually quite appropriate in this case.


git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@722337 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/lib/cpp/src/concurrency/PosixThreadFactory.cpp b/lib/cpp/src/concurrency/PosixThreadFactory.cpp
index 5995341..001d6ad 100644
--- a/lib/cpp/src/concurrency/PosixThreadFactory.cpp
+++ b/lib/cpp/src/concurrency/PosixThreadFactory.cpp
@@ -139,9 +139,8 @@
     }
   }
 
-  id_t getId() {
-    // TODO(dreiss): Stop using C-style casts.
-    return (id_t)pthread_;
+  Thread::id_t getId() {
+    return (Thread::id_t)pthread_;
   }
 
   shared_ptr<Runnable> runnable() const { return Thread::runnable(); }