Enable init'ed but unused var warning on windows for closer parity with mac/linux warnings.
Review URL: https://codereview.chromium.org/12536008

git-svn-id: http://skia.googlecode.com/svn/trunk@8307 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/device/xps/SkXPSDevice.cpp b/src/device/xps/SkXPSDevice.cpp
index 30ac330..f0afe69 100644
--- a/src/device/xps/SkXPSDevice.cpp
+++ b/src/device/xps/SkXPSDevice.cpp
@@ -950,7 +950,7 @@
         SkASSERT(1 == info.fColorCount);
         SkColor color;
         info.fColors = &color;
-        SkShader::GradientType gradientType = shader->asAGradient(&info);
+        shader->asAGradient(&info);
         SkAlpha alpha = skPaint.getAlpha();
         HR(this->createXpsSolidColorBrush(color, alpha, brush));
         return S_OK;