fix security bug

src/pathops/SkPathOpsTSect.h

Index: src/pathops/SkPathOpsTSect.h
diff --git a/src/pathops/SkPathOpsTSect.h b/src/pathops/SkPathOpsTSect.h
index 01ab8c65904b9098c613bce41afbcca9fc90766a..cf63b334d54108033694924bdf8d6f90778b62a4 100644
--- a/src/pathops/SkPathOpsTSect.h
+++ b/src/pathops/SkPathOpsTSect.h
@@ -512,7 +512,7 @@ int SkTSpan<TCurve, OppCurve>::hullCheck(const SkTSpan<OppCurve, TCurve>* opp,
         }
         fIsLinear = true;
         fIsLine = fPart.controlsInside();
-        return ptsInCommon ? 2 : -1;
+        return ptsInCommon ? 1 : -1;
     } else {  // hull is not linear; check set true if intersected at the end points
         return ((int) ptsInCommon) << 1;  // 0 or 2
     }