Fix int->scalar warning on windows

gm/discard.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #if SK_SUPPORT_GPU
 
 #include "gm.h"
@@ skipping 56 matching lines @@
                   case 1:
                       surface->getCanvas()->clear(color);
                       break;
                   case 2:
                       SkColorShader shader(color);
                       SkPaint paint;
                       paint.setShader(&shader);
                       surface->getCanvas()->drawPaint(paint);
                       break;
               }
-              surface->draw(canvas, 10*x, 10*y, NULL);
+              surface->draw(canvas, 10.f*x, 10.f*y, NULL);
             }
         }
 
         surface->getCanvas()->discard();
         surface->unref();
     }
 
 private:
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 DEF_GM( return SkNEW(DiscardGM); )
 
 } // end namespace
 
 #endif