fix more 64bit warnings

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 1011 matching lines @@
     SkLua(L).pushRect(get_obj<SkRRect>(L, 1)->rect());
     return 1;
 }
 
 static int lrrect_type(lua_State* L) {
     lua_pushstring(L, rrect_type(*get_obj<SkRRect>(L, 1)));
     return 1;
 }
 
 static int lrrect_radii(lua_State* L) {
-    int corner = lua_tointeger(L, 2);
+    int corner = SkToInt(lua_tointeger(L, 2));
     SkVector v;
     if (corner < 0 || corner > 3) {
         SkDebugf("bad corner index %d", corner);
         v.set(0, 0);
     } else {
         v = get_obj<SkRRect>(L, 1)->radii((SkRRect::Corner)corner);
     }
     lua_pushnumber(L, v.fX);
     lua_pushnumber(L, v.fY);
     return 2;
@@ skipping 185 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;
 }