Fix typo in uGNI prepare source that could cause incorrect results with

non-contiguous datatypes.

cmr=v1.7.3

This commit was SVN r29294.

ompi/mca/btl/ugni/btl_ugni_prepare.h

@@ -87,7 +87,6 @@ mca_btl_ugni_prepare_src_send_buffered (struct mca_btl_base_module_t *btl,
     mca_btl_ugni_base_frag_t *frag = NULL;
     uint32_t iov_count = 1;
     struct iovec iov;
-    size_t max_size = *size;
     int rc;
 
     if (OPAL_UNLIKELY(true == use_eager_get)) {
@@ -120,7 +119,7 @@ mca_btl_ugni_prepare_src_send_buffered (struct mca_btl_base_module_t *btl,
         iov.iov_len  = *size;
         iov.iov_base = (IOVBASE_TYPE *) frag->base.super.ptr;
 
-        rc = opal_convertor_pack (convertor, &iov, &iov_count, &max_size);
+        rc = opal_convertor_pack (convertor, &iov, &iov_count, size);
         if (OPAL_UNLIKELY(rc < 0)) {
             mca_btl_ugni_frag_return (frag);
             return NULL;