shape ops work in progress

git-svn-id: http://skia.googlecode.com/svn/trunk@7453 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/experimental/Intersection/QuarticRoot.cpp b/experimental/Intersection/QuarticRoot.cpp
index 6941935..759e209 100644
--- a/experimental/Intersection/QuarticRoot.cpp
+++ b/experimental/Intersection/QuarticRoot.cpp
@@ -58,7 +58,7 @@
         return num;
     }
     if (oneHint) {
-        assert(approximately_zero(t4 + t3 + t2 + t1 + t0)); // 1 is one root
+        SkASSERT(approximately_zero(t4 + t3 + t2 + t1 + t0)); // 1 is one root
         int num = cubicRootsReal(t4, t4 + t3, -(t1 + t0), -t0, roots); // note that -C==A+B+D+E
         for (int i = 0; i < num; ++i) {
             if (approximately_equal(roots[i], 1)) {