hide nested hinting enum

Bug: skia:2664
Bug: skia:8527
Change-Id: I8f4b832d5524fb792bcc608d6bd515229881b048
Reviewed-on: https://skia-review.googlesource.com/c/168270
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
diff --git a/src/utils/SkLua.cpp b/src/utils/SkLua.cpp
index 495a4f6..561953e 100644
--- a/src/utils/SkLua.cpp
+++ b/src/utils/SkLua.cpp
@@ -818,7 +818,7 @@
 }
 
 static int lpaint_getHinting(lua_State* L) {
-    SkLua(L).pushU32(get_obj<SkPaint>(L, 1)->getHinting());
+    SkLua(L).pushU32((unsigned)get_obj<SkPaint>(L, 1)->getHinting());
     return 1;
 }