quad and conic do not intersect

src/pathops/SkDConicLineIntersection.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SkIntersections.h"
 #include "SkPathOpsConic.h"
 #include "SkPathOpsCurve.h"
 #include "SkPathOpsLine.h"
 
 class LineConicIntersections {
 public:
     enum PinTPoint {
         kPointUninitialized,
         kPointInitialized
     };
 
     LineConicIntersections(const SkDConic& c, const SkDLine& l, SkIntersections* i)
         : fConic(c)
         , fLine(&l)
         , fIntersections(i)
         , fAllowNear(true) {
-        i->setMax(3);  // allow short partial coincidence plus discrete intersection
+        i->setMax(4);  // allow short partial coincidence plus discrete intersection
     }
 
     LineConicIntersections(const SkDConic& c)
         : fConic(c)
         SkDEBUGPARAMS(fLine(nullptr))
         SkDEBUGPARAMS(fIntersections(nullptr))
         SkDEBUGPARAMS(fAllowNear(false)) {
     }
 
     void allowNear(bool allow) {
@@ skipping 340 matching lines @@
 
 int SkIntersections::HorizontalIntercept(const SkDConic& conic, SkScalar y, double* roots) {
     LineConicIntersections c(conic);
     return c.horizontalIntersect(y, roots);
 }
 
 int SkIntersections::VerticalIntercept(const SkDConic& conic, SkScalar x, double* roots) {
     LineConicIntersections c(conic);
     return c.verticalIntersect(x, roots);
 }