path hang

path hang

In release, path hangs because buffers overflow.
Debug shows that the clipped cubic generates 34 points although
a maximum of 32 are expected.

The path has very small numbers that fool MaxCurvature into
thinking that there are more places to break the cubic than
are necessary.

To make this bullet-proof, increase the verbs and points.

Allow (1 line + 1 cubic) * (3 x-pieces) * (3 y-pieces) == 18 verbs.
Allow (6 points for line + cubic + line) * 9 pieces    == 54 points.

R=reed@google.com,liyuqian@google.com
BUG=698714

Change-Id: I04fad10c151c79d0c53465a2b658aa4dd59f1c98
Reviewed-on: https://skia-review.googlesource.com/9983
Reviewed-by: Yuqian Li <liyuqian@google.com>
Commit-Queue: Cary Clark <caryclark@google.com>