Fix two memory leaks.

Found by coverity.

Signed-off-by: yinpeijun <yinpeijun@huawei.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>

lib/stream-ssl.c

@@ -1196,6 +1196,7 @@ read_cert_file(const char *file_name, X509 ***certs, size_t *n_certs)
             free(*certs);
             *certs = NULL;
             *n_certs = 0;
+            fclose(file);
             return EIO;
         }