extcap: Close control handles when done

Ensure the event handles are closed when done to avoid leakages.
Also improved the control reader to use WaitForSingleObject().

Change-Id: I1679d9c09e247b28117ec05c3e1b0f3ba0e99674
Ping-Bug: 13833
Reviewed-on: https://code.wireshark.org/review/23263
Petri-Dish: Stig Bjørlykke <stig@bjorlykke.org>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Stig Bjørlykke <stig@bjorlykke.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/extcap_spawn.c b/extcap_spawn.c
index d88c3945d0..a4d5e0d9c0 100644
--- a/extcap_spawn.c
+++ b/extcap_spawn.c
@@ -379,6 +379,7 @@ extcap_wait_for_pipe(HANDLE * pipe_handles, int num_pipe_handles, HANDLE pid)
                     else
                     {
                         pipeinsts[idx].pendingIO = FALSE;
+                        CloseHandle(pipeinsts[idx].ol.hEvent);
                         num_waiting_to_connect--;
                     }
                 }