A type cast.

This commit was SVN r22672.

ompi/communicator/comm.c

@@ -1016,7 +1016,7 @@ int ompi_comm_free ( ompi_communicator_t **comm )
          * makes sure that the pointer to the dependent communicator
          * still contains a valid object.
          */
-        ompi_communicator_t *tmpcomm = opal_pointer_array_get_item(&ompi_mpi_communicators, cid);
+        ompi_communicator_t *tmpcomm = (ompi_communicator_t *) opal_pointer_array_get_item(&ompi_mpi_communicators, cid);
         if ( NULL != tmpcomm ){
             OBJ_RELEASE (tmpcomm);
         }