Add missing thread imports so that evport.c will build

When I made the changes to release the base lock around the call to
port_getn(), I didn't add evthread-internal.h to the includes in
evport.c would build, and I didn't catch it since I haven't got a
Solaris host to build on.  Tao Feng just reported this on
Libevent-users.

1 files changed, 3 insertions, 0 deletions

diff --git a/evport.c b/evport.c
index 1baac621..a203d8ae 100644
--- a/evport.c
+++ b/evport.c
@@ -64,6 +64,9 @@
 #include <time.h>
 #include <unistd.h>
 
+#include <event2/thread.h>
+
+#include "evthread-internal.h"
 #include "event-internal.h"
 #include "log-internal.h"
 #include "evsignal-internal.h"