ob1: reset the converter after a failed sendi before trying send

This commit was SVN r26597.

ompi/mca/pml/ob1/pml_ob1_sendreq.c

@@ -481,6 +481,8 @@ int mca_pml_ob1_send_request_start_copy( mca_pml_ob1_send_request_t* sendreq,
             MCA_PML_OB1_PROGRESS_PENDING(bml_btl);
             return OMPI_SUCCESS;
         }
+
+        MCA_PML_OB1_SEND_REQUEST_RESET(sendreq);
     } else { 
         /* allocate descriptor */
         mca_bml_base_alloc( bml_btl, &des,