fix memory leak



git-svn-id: http://skia.googlecode.com/svn/trunk@471 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/BitmapCopyTest.cpp b/tests/BitmapCopyTest.cpp
index 2ae7b0a..be3850e 100644
--- a/tests/BitmapCopyTest.cpp
+++ b/tests/BitmapCopyTest.cpp
@@ -108,7 +108,7 @@
                 ct = init_ctable();
             }
             src.allocPixels(ct);
-            ct->safeRef();
+            SkSafeUnref(ct);
 
             init_src(src);
             bool success = src.copyTo(&dst, gPairs[j].fConfig);