rpcrt4: Move NdrGetUserMarshalInfo stub near user marshal functions. Add documentation header.

dlls/rpcrt4/ndr_marshall.c

@@ -4331,6 +4331,15 @@ void WINAPI NdrUserMarshalFree(PMIDL_STUB_MESSAGE pStubMsg,
 }
 
 /***********************************************************************
+ *           NdrGetUserMarshalInfo [RPCRT4.@]
+ */
+RPC_STATUS RPC_ENTRY NdrGetUserMarshalInfo(ULONG *flags, ULONG level, NDR_USER_MARSHAL_INFO *mi)
+{
+  FIXME("(%p,%u,%p)\n", flags, level, mi);
+  return RPC_X_INVALID_BUFFER;
+}
+
+/***********************************************************************
  *           NdrClearOutParameters [RPCRT4.@]
  */
 void WINAPI NdrClearOutParameters(PMIDL_STUB_MESSAGE pStubMsg,

dlls/rpcrt4/rpcrt4_main.c

@@ -894,9 +894,3 @@ RPC_STATUS RPC_ENTRY RpcCancelThreadEx(void* ThreadHandle, LONG Timeout)
     else
         return rpc_cancel_thread(target_tid);
 }
-
-RPC_STATUS RPC_ENTRY NdrGetUserMarshalInfo(ULONG *flags, ULONG level, NDR_USER_MARSHAL_INFO *mi)
-{
-    FIXME("(%p, %u, %p)\n", flags, level, mi);
-    return RPC_X_INVALID_BUFFER;
-}