Fix a missing function pointer - reference ticket #854

This commit was SVN r13476.

orte/mca/pls/bproc/pls_bproc.c

@@ -104,6 +104,7 @@ orte_pls_base_module_t orte_pls_bproc_module = {
     orte_pls_bproc_terminate_proc,
     orte_pls_bproc_signal_job,
     orte_pls_bproc_signal_proc,
+    orte_pls_bproc_cancel_operation,
     orte_pls_bproc_finalize
 };