update slides

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"
 
 #if SK_SUPPORT_GPU
@@ skipping 1888 matching lines @@
                                                   (SkTypeface::Style)style);
 //    SkDebugf("---- name <%s> style=%d, face=%p ref=%d\n", name, style, face, face->getRefCnt());
     if (NULL == face) {
         face = SkTypeface::RefDefault();
     }
     push_ref(L, face)->unref();
     return 1;
 }
 
 static int lsk_newRasterSurface(lua_State* L) {
-    int width = lua2int_def(L, 2, 0);
+    int width = lua2int_def(L, 1, 0);
     int height = lua2int_def(L, 2, 0);
     SkImageInfo info = SkImageInfo::MakeN32Premul(width, height);
     SkSurface* surface = SkSurface::NewRaster(info);
     if (NULL == surface) {
         lua_pushnil(L);
     } else {
         push_ref(L, surface)->unref();
     }
     return 1;
 }
@@ skipping 62 matching lines @@
     REG_CLASS(L, SkSurface);
     REG_CLASS(L, SkTextBlob);
     REG_CLASS(L, SkTypeface);
 }
 
 extern "C" int luaopen_skia(lua_State* L);
 extern "C" int luaopen_skia(lua_State* L) {
     SkLua::Load(L);
     return 0;
 }