wait for everyone to enter and send before releasing them

(since oob sends are not synchronous)

This commit was SVN r2913.

src/mca/oob/base/oob_base_barrier.c

@@ -40,14 +40,14 @@ int mca_oob_barrier(void)
     else {
         int tag=-1;
         for (i = 1; i < npeers; i++) {
-            rc = mca_oob_send(&peers[i],&iov,1,tag,0);
+            rc = mca_oob_recv(&peers[i],&iov,1,&tag,0);
             if (rc < 0) {
                 return rc;
             }
         }
 
         for (i = 1; i < npeers; i++) {
-            rc = mca_oob_recv(&peers[i],&iov,1,&tag,0);
+            rc = mca_oob_send(&peers[i],&iov,1,tag,0);
             if (rc < 0) {
                 return rc;
             }