[PATCH v2 0/2] negotiator/default: avoid stack overflow

This series avoid stack overflow in negotiator/default.c and memory leak in negotiator/skipping.c.

Changes since v1:
* Add duplicate protection in negotiator/default.c and
  negotiator/skipping.c.
* Split the memory leak cleanup in negotiator/skipping.c into its own
  change and fix some other problems sugguested by Derrick Stolee.
* Minor grammar/comment etc. fixes throughout.

Han Xin (2):
  negotiator/default: avoid stack overflow
  negotiator/skipping: fix some problems in mark_common()

 negotiator/default.c  | 39 +++++++++++++++++++++++++++++----------
 negotiator/skipping.c | 10 ++++++----
 2 files changed, 35 insertions(+), 14 deletions(-)

Range-diff against v1: 1: a0a1473f5e < -: ---------- negotiator/default.c: avoid stack overflow -: ---------- > 1: 935be72eb9 negotiator/default: avoid stack overflow -: ---------- > 2: abbb1bc0b3 negotiator/skipping: fix some problems in mark_common()