Always send a message even when the send_count is zero. Except for local operations (send + receive),

they can be safely skiped.

This commit was SVN r6792.

ompi/mca/coll/basic/coll_basic_scatterv.c

@@ -70,14 +70,14 @@ int mca_coll_basic_scatterv_intra(void *sbuf, int *scounts,
     }
 
     for (i = 0; i < size; ++i) {
-    if (0 == scounts[i]) {
-      continue;
-    }
         ptmp = ((char *) sbuf) + (extent * disps[i]);
 
         /* simple optimization */
 
         if (i == rank) {
+            if( 0 == scounts[i] ) {  /* simple optimization or a local operation */
+                continue;
+            }
             err = ompi_ddt_sndrcv(ptmp, scounts[i], sdtype, rbuf, rcount, rdtype);
         } else {
             err = MCA_PML_CALL(send(ptmp, scounts[i], sdtype, i,