Plug a leak in SampleShaderTest.

Review URL:  http://codereview.appspot.com/4517086/



git-svn-id: http://skia.googlecode.com/svn/trunk@1384 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/SampleShaderText.cpp b/samplecode/SampleShaderText.cpp
index 47ee7ee..790137c 100644
--- a/samplecode/SampleShaderText.cpp
+++ b/samplecode/SampleShaderText.cpp
@@ -174,7 +174,7 @@
             canvas->save();
             canvas->translate(SkIntToScalar((s / testsPerCol) * colWidth),
                               SkIntToScalar((s % testsPerCol) * rowHeight));
-                              paint.setShader(shaders[s])->ref();
+            paint.setShader(shaders[s])->unref();
             canvas->drawText(text, textLen, 0, textBase, paint);
             canvas->restore();
         }