-fix for potential crash where read_fds may be null in ares read_tcp_data 
  - this is possible when using epoll
  - Thanks to Taras Shypytiak for pointing this out.

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@10466 ddefafc4-47db-0310-ae44-fa13212b10f2
reTurn: build tests after client

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@10467 ddefafc4-47db-0310-ae44-fa13212b10f2