fix more 64bit warnings

samplecode/SampleHairline.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SampleCode.h"
 #include "SkView.h"
 #include "SkCanvas.h"
@@ skipping 56 matching lines @@
     size_t rb = bm.rowBytes();
     for (int i = 0; i < margin; i++) {
         if (!check_zeros(bm.getAddr32(0, i), bm.width(), 1)) {
             return false;
         }
         int bottom = bm.height() - i - 1;
         if (!check_zeros(bm.getAddr32(0, bottom), bm.width(), 1)) {
             return false;
         }
         // left column
-        if (!check_zeros(bm.getAddr32(i, 0), bm.height(), rb >> 2)) {
+        if (!check_zeros(bm.getAddr32(i, 0), bm.height(), SkToInt(rb >> 2))) {
             return false;
         }
         int right = bm.width() - margin + i;
-        if (!check_zeros(bm.getAddr32(right, 0), bm.height(), rb >> 2)) {
+        if (!check_zeros(bm.getAddr32(right, 0), bm.height(),
+                         SkToInt(rb >> 2))) {
             return false;
         }
     }
     return true;
 }
 
 #define WIDTH   620
 #define HEIGHT  460
 #define MARGIN  10
 
@@ skipping 177 matching lines @@
 
 
 private:
     typedef SampleView INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static SkView* MyFactory() { return new HairlineView; }
 static SkViewRegister reg(MyFactory);