Fix yet another convexicator issue

src/core/SkPath.cpp

Index: src/core/SkPath.cpp
diff --git a/src/core/SkPath.cpp b/src/core/SkPath.cpp
index 5288b85db37e3ed4e6d5e68532975032ef7374d5..25fd058d20468feec4cf99d514cbad6fe4dcc4e8 100644
--- a/src/core/SkPath.cpp
+++ b/src/core/SkPath.cpp
@@ -2242,7 +2242,7 @@ struct Convexicator {
             ++fPtCount;
         } else {
             SkVector vec = pt - fCurrPt;
-            if (vec.fX || vec.fY) {
+            if (!SkScalarNearlyZero(vec.lengthSqd(), SK_ScalarNearlyZero*SK_ScalarNearlyZero)) {

[caryclark, 2014/11/17 19:37:55]

looks like SK_ScalarNearlyZero*SK_ScalarNearlyZero is a number pulled out of a
hat (but so is SK_ScalarNearlyZero)

it would be neat to test what the empirical limit of vec.lengthSqd() really is
-- but that can wait for another day.

                 fLastPt = fCurrPt;
                 fCurrPt = pt;
                 if (++fPtCount == 2) {