Always return errors in ssl3_get_client_hello

If we successfully match a cookie don't set return value to 2 as this
results in other error conditions returning 2 as well.

Instead set return value to -2 which can be checked later if everything
else is OK.

ssl/s3_srvr.c

diff --git a/ssl/s3_srvr.c b/ssl/s3_srvr.c
index 200f495..d915155 100644
--- a/ssl/s3_srvr.c
+++ b/ssl/s3_srvr.c
@@ -1082,8 +1082,8 @@
 						SSL_R_COOKIE_MISMATCH);
 					goto f_err;
 				}
-
-			ret = 2;
+			/* Set to -2 so if successful we return 2 */
+			ret = -2;
 			}
 
 		p += cookie_len;
@@ -1461,7 +1461,7 @@
 			}
 		}
 
-	if (ret < 0) ret=1;
+	if (ret < 0) ret=-ret;
 	if (0)
 		{
 f_err:
@@ -1469,7 +1469,7 @@
 		}
 err:
 	if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers);
-	return(ret);
+	return ret < 0 ? -1 : ret;
 	}
 
 int ssl3_send_server_hello(SSL *s)