Silence warning

ompi/mca/bml/r2/bml_r2.c

@@ -268,7 +268,7 @@ static int mca_bml_r2_endpoint_add_btl (struct ompi_proc_t *proc, mca_bml_base_e
     }
 
     /* always add rdma endpoints if they support full rdma */
-    if ((btl_in_use && (btl_flags & MCA_BTL_FLAGS_RDMA) ||
+    if (((btl_in_use && (btl_flags & MCA_BTL_FLAGS_RDMA)) ||
          (btl_flags & (MCA_BTL_FLAGS_RDMA | MCA_BTL_FLAGS_ATOMIC_FOPS)) == (MCA_BTL_FLAGS_RDMA | MCA_BTL_FLAGS_ATOMIC_FOPS)) &&
         !((proc->super.proc_arch != ompi_proc_local_proc->super.proc_arch) &&
           (0 == (btl->btl_flags & MCA_BTL_FLAGS_HETEROGENEOUS_RDMA)))) {