fix warnings around size_t/int

src/utils/SkLuaCanvas.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 "SkLuaCanvas.h"
 #include "SkLua.h"
 
@@ skipping 150 matching lines @@
 }
 
 void SkLuaCanvas::drawPaint(const SkPaint& paint) {
     AUTO_LUA("drawPaint");
     lua.pushPaint(paint, "paint");
 }
 
 void SkLuaCanvas::drawPoints(PointMode mode, size_t count,
                                const SkPoint pts[], const SkPaint& paint) {
     AUTO_LUA("drawPoints");
-    lua.pushArrayPoint(pts, count, "points");
+    lua.pushArrayPoint(pts, SkToInt(count), "points");
     lua.pushPaint(paint, "paint");
 }
 
 void SkLuaCanvas::drawOval(const SkRect& rect, const SkPaint& paint) {
     AUTO_LUA("drawOval");
     lua.pushRect(rect, "rect");
     lua.pushPaint(paint, "paint");
 }
 
 void SkLuaCanvas::drawRect(const SkRect& rect, const SkPaint& paint) {
@@ skipping 97 matching lines @@
                                  const SkColor colors[], SkXfermode* xmode,
                                  const uint16_t indices[], int indexCount,
                                  const SkPaint& paint) {
     AUTO_LUA("drawVertices");
     lua.pushPaint(paint, "paint");
 }
 
 void SkLuaCanvas::drawData(const void* data, size_t length) {
     AUTO_LUA("drawData");
 }