Fix a few style nits in the wpacket code

Addressing more feedback comments.

Reviewed-by: Rich Salz <rsalz@openssl.org>

ssl/t1_lib.c

diff --git a/ssl/t1_lib.c b/ssl/t1_lib.c
index 024556e..50083a9 100644
--- a/ssl/t1_lib.c
+++ b/ssl/t1_lib.c
@@ -3331,6 +3331,7 @@
                        const unsigned char *psig, size_t psiglen)
 {
     size_t i;
+
     for (i = 0; i < psiglen; i += 2, psig += 2) {
         if (tls12_sigalg_allowed(s, SSL_SECOP_SIGALG_SUPPORTED, psig)) {
             if (!WPACKET_put_bytes(pkt, psig[0], 1)