Change GraphicBuffer fields from uint to int

This changes fields which are tracking GraphicBuffer width and height
to use int instead of uint32_t, which is in keeping with a recent
change to GraphicBuffer itself and avoids a warning (error since this
build uses -Werror).

Change-Id: I66c5c3e3d321d4ef5ea2c40c86ac068111c18662
diff --git a/libs/hwui/DeferredLayerUpdater.h b/libs/hwui/DeferredLayerUpdater.h
index ef385b9..61efafe 100644
--- a/libs/hwui/DeferredLayerUpdater.h
+++ b/libs/hwui/DeferredLayerUpdater.h
@@ -38,7 +38,7 @@
     ANDROID_API DeferredLayerUpdater(renderthread::RenderThread& thread, Layer* layer);
     ANDROID_API ~DeferredLayerUpdater();
 
-    ANDROID_API bool setSize(uint32_t width, uint32_t height) {
+    ANDROID_API bool setSize(int width, int height) {
         if (mWidth != width || mHeight != height) {
             mWidth = width;
             mHeight = height;
@@ -83,8 +83,8 @@
 
 private:
     // Generic properties
-    uint32_t mWidth;
-    uint32_t mHeight;
+    int mWidth;
+    int mHeight;
     bool mBlend;
     SkColorFilter* mColorFilter;
     int mAlpha;