[Bug 36614] valgrind shows a definite leak in rpcrt4/rpc_server.c process_request_packet()

https://bugs.winehq.org/show_bug.cgi?id=36614

--- Comment #1 from Austin English  ---
I got something similar in ieframe/test/intshcut.c:
../../../tools/runtest -q -P wine -T ../../.. -M ieframe.dll -p
ieframe_test.exe.so intshcut && touch intshcut.ok
==18050== 48 bytes in 1 blocks are definitely lost in loss record 3,420 of
6,149
==18050==    at 0x7BC4C6DF: notify_alloc (heap.c:255)
==18050==    by 0x7BC50F23: RtlAllocateHeap (heap.c:1716)
==18050==    by 0x52896A8: dispatch_rpc (rpc.c:1453)
==18050==    by 0x5BE4AAE: process_request_packet (rpc_server.c:441)
==18050==    by 0x5BE4F02: RPCRT4_process_packet (rpc_server.c:519)
==18050==    by 0x5BE5095: RPCRT4_worker_thread (rpc_server.c:541)
==18050==    by 0x7BC90AA0: worker_thread_proc (threadpool.c:110)
==18050==    by 0x7BC8714F: ??? (signal_i386.c:2571)
==18050==    by 0x7BC87198: call_thread_func (signal_i386.c:2630)
==18050==    by 0x7BC8712D: ??? (signal_i386.c:2571)
==18050==    by 0x7BC8E579: start_thread (thread.c:429)
==18050==    by 0x421FF92: start_thread (pthread_create.c:309)
==18050==    by 0x432485D: clone (clone.S:129)
==18050==