fix minor skp-found bugs

src/pathops/SkDQuadLineIntersection.cpp

Index: src/pathops/SkDQuadLineIntersection.cpp
diff --git a/src/pathops/SkDQuadLineIntersection.cpp b/src/pathops/SkDQuadLineIntersection.cpp
index 45daa10dbdd35a3cb4ebc1ce4a852935fa8e1890..1b9d8ccd382e7fd7e16f58e9cf0f31f5b2496c02 100644
--- a/src/pathops/SkDQuadLineIntersection.cpp
+++ b/src/pathops/SkDQuadLineIntersection.cpp
@@ -98,7 +98,7 @@ public:
         , fLine(l)
         , fIntersections(i)
         , fAllowNear(true) {
-        i->setMax(2);
+        i->setMax(3);  // allow short partial coincidence plus discrete intersection
     }
 
     void allowNear(bool allow) {
@@ -331,6 +331,9 @@ protected:
             *pt = fLine[1];
             *lineT = 1;
         }
+        if (fIntersections->used() > 0 && approximately_equal((*fIntersections)[1][0], *lineT)) {
+            return false;
+        }
         if (gridPt == fQuad[0].asSkPoint()) {
             *pt = fQuad[0];
             *quadT = 0;