Use the initialization value to check if tun_is_up

Fixes #826

Signed-off-by: Marios Paouris <mspaourh@gmail.com>

diff --git a/openconnect-internal.h b/openconnect-internal.h
index 6925d60c3bc091559547dffc9ce7963d0ef225e8..abf45bbd39c85378eecc7eaebf00661aae4246a2 100644 (file)
--- a/openconnect-internal.h
+++ b/openconnect-internal.h
@@ -1154,7 +1154,7 @@ static inline int set_fd_cloexec(int fd)
 static inline int tun_is_up(struct openconnect_info *vpninfo)
 {
 #ifdef _WIN32
-       return vpninfo->tun_fh != NULL;
+       return vpninfo->tun_fh != INVALID_HANDLE_VALUE;
 #else
        return vpninfo->tun_fd != -1;
 #endif