split tight quads and cubics

src/pathops/SkPathOpsTSect.h

Index: src/pathops/SkPathOpsTSect.h
diff --git a/src/pathops/SkPathOpsTSect.h b/src/pathops/SkPathOpsTSect.h
index 6ae6ee528f4686cbcac2fe41e5048415d1e2fffa..f84aaaa6b7bdccebf4e7fd91f7530f7ade9b02eb 100644
--- a/src/pathops/SkPathOpsTSect.h
+++ b/src/pathops/SkPathOpsTSect.h
@@ -1531,7 +1531,8 @@ int SkTSect<TCurve, OppCurve>::linesIntersect(SkTSpan<TCurve, OppCurve>* span,
         workT += tStep;
         workPt = fCurve.ptAtT(workT);
         coinW.setPerp(fCurve, workT, workPt, opp->fCurve);
-        if (coinW.perpT() < 0) {
+        double perpT = coinW.perpT();
+        if (coinW.isCoincident() ? !between(oppSpan->fStartT, perpT, oppSpan->fEndT) : perpT < 0) {
             continue;
         }
         SkDVector perpW = workPt - coinW.perpPt();