harden pathops for pathological test

src/pathops/SkPathOpsPoint.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef SkPathOpsPoint_DEFINED
 #define SkPathOpsPoint_DEFINED
 
 #include "SkPathOpsTypes.h"
@@ skipping 209 matching lines @@
         return RoughlyEqualUlps(largest, largest + dist); // is the dist within ULPS tolerance?
     }
 
     bool roughlyEqual(const SkDPoint& a) const {
         return roughly_equal(a.fY, fY) && roughly_equal(a.fX, fX);
     }
 
     // utilities callable by the user from the debugger when the implementation code is linked in
     void dump() const;
     static void Dump(const SkPoint& pt);
+    static void DumpHex(const SkPoint& pt);
 };
 
 #endif