Updating SkAvoidXferMode to use new 4byte interp function.
Review URL: https://codereview.appspot.com/5795058

git-svn-id: http://skia.googlecode.com/svn/trunk@3363 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/effects/SkAvoidXfermode.cpp b/src/effects/SkAvoidXfermode.cpp
index 9f4e396..d198884 100644
--- a/src/effects/SkAvoidXfermode.cpp
+++ b/src/effects/SkAvoidXfermode.cpp
@@ -138,7 +138,7 @@
                     continue;
                 }
             }
-            dst[i] = SkFourByteInterp(src[i], dst[i], d);
+            dst[i] = SkFourByteInterp256(src[i], dst[i], d);
         }
     }
 }