fix some printf formats for 64 bits

rts/sm/GCUtils.c

@@ -178,7 +178,7 @@ todo_block_full (nat size, step_workspace *ws)
         {
             step *stp;
             stp = ws->step;
-            trace(TRACE_gc|DEBUG_gc, "push todo block %p (%d words), step %d, n_todos: %d", 
+            trace(TRACE_gc|DEBUG_gc, "push todo block %p (%ld words), step %d, n_todos: %d", 
                   bd->start, bd->free - bd->u.scan, stp->abs_no, stp->n_todos);
             // ToDo: use buffer_todo
             ACQUIRE_SPIN_LOCK(&stp->sync_todo);

rts/sm/Sweep.c

@@ -70,7 +70,7 @@ sweep(step *step)
 
     step->live_estimate = live;
 
-    trace(DEBUG_gc|TRACE_gc, "sweeping: %d blocks, %d were copied, %d freed (%d%%), %d are fragmented, live estimate: %d%%",
+    trace(DEBUG_gc|TRACE_gc, "sweeping: %d blocks, %d were copied, %d freed (%d%%), %d are fragmented, live estimate: %ld%%",
           step->n_old_blocks + freed,
           step->n_old_blocks - blocks + freed,
           freed,