HevSocks5Tunnel: Fix use uninitialized variable

Fixes #296

Author: heiher

src/hev-socks5-tunnel.c

@@ -690,7 +690,7 @@ hev_socks5_tunnel_run (void)
 void
 hev_socks5_tunnel_stop (void)
 {
-    int res;
+    int res = 0;
     int fd;
 
     LOG_D ("socks5 tunnel stop");