In an MPI_IBCAST, we cannot shortcut if there's only 1 process.

cmr=v1.7.4:reviewer=brbarret:subject=Fix IBCAST for COMM_SELF
-This line, and those below, will be ignored--

M    c/ibcast.c

This commit was SVN r30054.

ompi/mpi/c/ibcast.c

@@ -72,13 +72,6 @@ int MPI_Ibcast(void *buffer, int count, MPI_Datatype datatype,
       } 
     }
 
-    /* If there's only one node, or if the count is 0, we're done */
-
-    if ((OMPI_COMM_IS_INTRA(comm) && ompi_comm_size(comm) <= 1) ||
-        0 == count) {
-        return MPI_SUCCESS;
-    } 
-
     OPAL_CR_ENTER_LIBRARY();
 
     /* Invoke the coll component to perform the back-end operation */