merged changes from lsalzman/enet#e2ef839

include/enet.h

@@ -142,10 +142,10 @@
     #include <sys/ioctl.h>
     #include <sys/time.h>
     #include <sys/socket.h>
-    #include <sys/poll.h>
     #include <arpa/inet.h>
     #include <netinet/in.h>
     #include <netinet/tcp.h>
+    #include <poll.h>
     #include <netdb.h>
     #include <unistd.h>
     #include <string.h>