Whe don't need to register zero sized frags.

This commit was SVN r10519.

ompi/mca/btl/openib/btl_openib_component.c

@@ -615,7 +615,7 @@ mca_btl_base_module_t** mca_btl_openib_component_init(int *num_btl_modules,
                             mca_btl_openib_component.ib_free_list_num,
                             mca_btl_openib_component.ib_free_list_max,
                             mca_btl_openib_component.ib_free_list_inc,
-                            openib_btl->super.btl_mpool);
+                            NULL);
 
         orte_pointer_array_init(&openib_btl->eager_rdma_buffers, 
                 mca_btl_openib_component.max_eager_rdma,

ompi/mca/btl/openib/btl_openib_frag.c

@@ -30,12 +30,14 @@ static void mca_btl_openib_frag_common_constructor( mca_btl_openib_frag_t* frag)
     frag->segment.seg_addr.pval = ((unsigned char* )frag->hdr) + sizeof(mca_btl_openib_header_t);  
     /* init the segment address to start after the btl header */ 
 
+    if(registration) {    
         frag->mr = registration->mr; 
-    frag->segment.seg_len = frag->size;
         frag->segment.seg_key.key32[0] = (uint32_t) frag->mr->lkey; 
+        frag->sg_entry.lkey = frag->mr->lkey;
+    }
+    frag->segment.seg_len = frag->size;
     frag->sg_entry.addr = (unsigned long) frag->hdr; 
     frag->sg_entry.length = frag->size; 
-    frag->sg_entry.lkey = frag->mr->lkey; 
     frag->base.des_flags = 0; 
 }