Fix OpenBSD build

Add #include <sys/types.h>, needed by #include <sys/socket.h>.

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
diff --git a/qemu_socket.h b/qemu_socket.h
index 164ae3e..897a8ae 100644
--- a/qemu_socket.h
+++ b/qemu_socket.h
@@ -17,6 +17,7 @@
 
 #else
 
+#include <sys/types.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <netinet/tcp.h>