My clang now doesn't complain about !"foo".

BUG=
R=robertphillips@google.com

Review URL: https://codereview.chromium.org/22875037

git-svn-id: http://skia.googlecode.com/svn/trunk@10874 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/core/SkStrokeRec.cpp b/src/core/SkStrokeRec.cpp
index cdaf241..ce744e5 100644
--- a/src/core/SkStrokeRec.cpp
+++ b/src/core/SkStrokeRec.cpp
@@ -44,7 +44,7 @@
             }
             break;
         default:
-            SkASSERT(!"unknown paint style");
+            SkDEBUGFAIL("unknown paint style");
             // fall back on just fill
             fWidth = kStrokeRec_FillStyleWidth;
             fStrokeAndFill = false;