TL/UCP: fixed alignment

src/components/tl/ucp/tl_ucp_coll.h

@@ -183,7 +183,7 @@ typedef struct ucc_tl_ucp_task {
         } allgather_ring;
         struct {
             ucc_mc_buffer_header_t *scratch_header;
-            size_t scratch_size;
+            size_t                  scratch_size;
         } allgather_bruck;
         struct {
             ucc_rank_t              dist;