(kerberos5_init): check krb5_init_context for success

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@9432 ec53bebd-3082-4978-b11e-865c3cabbd6b

appl/telnet/libtelnet/kerberos5.c

@@ -145,9 +145,12 @@ Data(Authenticator *ap, int type, void *d, int c)
 int
 kerberos5_init(Authenticator *ap, int server)
 {
-    krb5_init_context(&context);
+    krb5_error_code ret;
+
+    ret = krb5_init_context(&context);
+    if (ret)
+	return 0;
     if (server) {
-	krb5_error_code ret;
 	krb5_keytab kt;
 	krb5_kt_cursor cursor;