Windows build fixes.

Windows doesn't have ssize_t, sadly. There's SSIZE_T, but defining an
OPENSSL_SSIZE_T seems worse than just using an int.

Change-Id: I09bb5aa03f96da78b619e551f92ed52ce24d9f3f
Reviewed-on: https://boringssl-review.googlesource.com/1352
Reviewed-by: Adam Langley <agl@google.com>
diff --git a/ssl/t1_lib.c b/ssl/t1_lib.c
index 8e77ef2..df7b3fb 100644
--- a/ssl/t1_lib.c
+++ b/ssl/t1_lib.c
@@ -1653,7 +1653,7 @@
  *   returns: 1 on success. */
 static int tls1_alpn_handle_client_hello(SSL *s, CBS *cbs, int *out_alert)
 	{
-	CBS protocol_name_list;
+	CBS protocol_name_list, protocol_name_list_copy;
 	const unsigned char *selected;
 	unsigned char selected_len;
 	int r;
@@ -1667,7 +1667,7 @@
 		goto parse_error;
 
 	/* Validate the protocol list. */
-	CBS protocol_name_list_copy = protocol_name_list;
+	protocol_name_list_copy = protocol_name_list;
 	while (CBS_len(&protocol_name_list_copy) > 0)
 		{
 		CBS protocol_name;