add a missing declaration in netdissect.c

diff --git a/netdissect.c b/netdissect.c
index 0c7d661d3da402b8d9f0c93a8e3abc4e48151cc8..3a6eb0f3602d8fe87fc0fe54e12be6b3a882cd96 100644 (file)
--- a/netdissect.c
+++ b/netdissect.c
@@ -48,6 +48,7 @@ nd_init(char *errbuf, size_t errbuf_size)
 #ifdef _WIN32
        WORD wVersionRequested;
        WSADATA wsaData;
+       int err;
 
        /*
         * Request Winsock 2.2; we expect Winsock 2.