Correct layer size formatting in trace

bug:18722704
Change-Id: Icef9aaa62633b2d86ad250f43d4c8fa5cc0b6842
diff --git a/libs/hwui/RenderNode.cpp b/libs/hwui/RenderNode.cpp
index 810e487..787ee62 100644
--- a/libs/hwui/RenderNode.cpp
+++ b/libs/hwui/RenderNode.cpp
@@ -429,9 +429,9 @@
                 clipFlags = 0; // all clipping done by saveLayer
             }
 
-            ATRACE_FORMAT("%s alpha caused %ssaveLayer %ux%u",
+            ATRACE_FORMAT("%s alpha caused %ssaveLayer %dx%d",
                     getName(), clipFlags ? "" : "unclipped ",
-                    layerBounds.getWidth(), layerBounds.getHeight());
+                    (int)layerBounds.getWidth(), (int)layerBounds.getHeight());
 
             SaveLayerOp* op = new (handler.allocator()) SaveLayerOp(
                     layerBounds.left, layerBounds.top, layerBounds.right, layerBounds.bottom,