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Octav ZlatiorAndy Green
f48ddd2a55e
Octav Zlatior authored and Andy Green committed d4dd69a254c
Subject: [PATCH] Fixes occasional segfault in lws_chage_pollfd

* so it happens that sometimes lws_change_pollfd is called with
  bad or incomplete data structures, mainly the context pointer
  obtained from wsi->protocol is null or wsi->position_in_fds_table
  is -1; checks have been added to avoid this condition