Add cast to fix Win* compile complaint/failure

src/utils/SkLua.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkLua.h"
 #include "SkCanvas.h"
 #include "SkData.h"
@@ skipping 627 matching lines @@
     SkLua(L).pushU32(get_obj<SkPaint>(L, 1)->getStrokeCap());
     return 1;
 }
 
 static int lpaint_getStrokeJoin(lua_State* L) {
     SkLua(L).pushU32(get_obj<SkPaint>(L, 1)->getStrokeJoin());
     return 1;
 }
 
 static int lpaint_getTextEncoding(lua_State* L) {
-    SkLua(L).pushScalar(static_cast<SkScalar>(get_obj<SkPaint>(L, 1)->getTextEncoding()));
+    SkLua(L).pushU32(get_obj<SkPaint>(L, 1)->getTextEncoding());
     return 1;
 }
 
 static int lpaint_getStrokeWidth(lua_State* L) {
     SkLua(L).pushScalar(get_obj<SkPaint>(L, 1)->getStrokeWidth());
     return 1;
 }
 
 static int lpaint_setStrokeWidth(lua_State* L) {
     get_obj<SkPaint>(L, 1)->setStrokeWidth(lua2scalar(L, 2));
@@ skipping 569 matching lines @@
     REG_CLASS(L, SkShader);
     REG_CLASS(L, SkTypeface);
     REG_CLASS(L, SkMatrix);
 }
 
 extern "C" int luaopen_skia(lua_State* L);
 extern "C" int luaopen_skia(lua_State* L) {
     SkLua::Load(L);
     return 0;
 }