Fix Windows build break introduced in r13864.

Need SkToBool(...).



git-svn-id: http://skia.googlecode.com/svn/trunk@13870 2bbb7eff-a529-9590-31e7-b0007b416f81

src/gpu/SkGpuDevice.cpp

@@ -209,7 +209,7 @@ void SkGpuDevice::initFromRenderTarget(GrContext* context,
 
     SkImageInfo info;
     surface->asImageInfo(&info);
-    SkPixelRef* pr = SkNEW_ARGS(SkGrPixelRef, (info, surface, flags & kCached_Flag));
+    SkPixelRef* pr = SkNEW_ARGS(SkGrPixelRef, (info, surface, SkToBool(flags & kCached_Flag)));
 
     this->setPixelRef(pr)->unref();
 }