Add a test to ensure that a case where SkCubicClipper::ChopMonoAtY returns false is handled properly.

Also fixes a style issue in the fix for the issue being tested.

BUG=chromium:613918
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2021343004

Review-Url: https://codereview.chromium.org/2021343004
diff --git a/src/core/SkPath.cpp b/src/core/SkPath.cpp
index bf27372..f5b53fc 100644
--- a/src/core/SkPath.cpp
+++ b/src/core/SkPath.cpp
@@ -2813,7 +2813,7 @@
     // compute the actual x(t) value
     SkScalar t;
     if (!SkCubicClipper::ChopMonoAtY(pts, y, &t)) {
-      return 0;
+        return 0;
     }
     SkScalar xt = eval_cubic_pts(pts[0].fX, pts[1].fX, pts[2].fX, pts[3].fX, t);
     if (SkScalarNearlyEqual(xt, x)) {
@@ -3052,7 +3052,7 @@
         SkPoint* c = &dst[i * 3];
         SkScalar t;
         if (!SkCubicClipper::ChopMonoAtY(c, y, &t)) {
-          continue;
+            continue;
         }
         SkScalar xt = eval_cubic_pts(c[0].fX, c[1].fX, c[2].fX, c[3].fX, t);
         if (!SkScalarNearlyEqual(x, xt)) {