Towards enabling -Werror in skia on Linux

Review URL: http://codereview.appspot.com/5516044/



git-svn-id: http://skia.googlecode.com/svn/trunk@2983 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/EmptyPathTest.cpp b/tests/EmptyPathTest.cpp
index b0b26b5..b126076 100644
--- a/tests/EmptyPathTest.cpp
+++ b/tests/EmptyPathTest.cpp
@@ -48,7 +48,7 @@
     }
 
     // success means we drew everywhere or nowhere (depending on shouldDraw)
-    bool success = shouldDraw ? (~0 == andValue) : (0 == orValue);
+    bool success = shouldDraw ? (~0U == andValue) : (0 == orValue);
 
     if (!success) {
         SkString str;