fix more 64bit warnings

gm/testimagefilters.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 "gm.h"
 #include "SkCanvas.h"
 #include "SkColorFilter.h"
@@ skipping 99 matching lines @@
             make0, make1, make2, make3, make4, make5, make6, make7
         };
 
         const SkRect bounds = SkRect::MakeWH(FILTER_WIDTH, FILTER_HEIGHT);
 
         const SkScalar dx = bounds.width() * 8 / 7;
         const SkScalar dy = bounds.height() * 8 / 7;
 
         canvas->translate(SkIntToScalar(8), SkIntToScalar(8));
 
-        for (size_t i = 0; i < SK_ARRAY_COUNT(gFilterProc); ++i) {
+        for (int i = 0; i < (int)SK_ARRAY_COUNT(gFilterProc); ++i) {
             int ix = i % 4;
             int iy = i / 4;
 
             SkAutoCanvasRestore acr(canvas, true);
             canvas->translate(ix * dx, iy * dy);
 
             SkPaint p;
             p.setStyle(SkPaint::kStroke_Style);
             canvas->drawRect(bounds, p);
 
             SkPaint paint;
             paint.setImageFilter(gFilterProc[i]())->unref();
             canvas->saveLayer(&bounds, &paint);
             draw0(canvas);
         }
     }
 
 private:
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static skiagm::GM* MyFactory(void*) { return new TestImageFiltersGM; }
 static skiagm::GMRegistry reg(MyFactory);