shape ops work in progress

git-svn-id: http://skia.googlecode.com/svn/trunk@4029 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/experimental/Intersection/LineUtilities.cpp b/experimental/Intersection/LineUtilities.cpp
index 38e1ba0..8d229e4 100644
--- a/experimental/Intersection/LineUtilities.cpp
+++ b/experimental/Intersection/LineUtilities.cpp
@@ -53,5 +53,5 @@
 //    See: the January 2001 Algorithm on Area of Triangles
 float isLeft( _Point P0, _Point P1, _Point P2 )
 {
-    return (P1.x - P0.x)*(P2.y - P0.y) - (P2.x - P0.x)*(P1.y - P0.y);
+    return (float) ((P1.x - P0.x)*(P2.y - P0.y) - (P2.x - P0.x)*(P1.y - P0.y));
 }