Use uint32_t consistently for flags.

Reviewed-by: Rich Salz <rsalz@openssl.org>
diff --git a/ssl/t1_lib.c b/ssl/t1_lib.c
index 402047a..f08eb84 100644
--- a/ssl/t1_lib.c
+++ b/ssl/t1_lib.c
@@ -3459,7 +3459,7 @@
     size_t i;
     const EVP_MD *md;
     const EVP_MD **pmd = s->s3->tmp.md;
-    int *pvalid = s->s3->tmp.valid_flags;
+    uint32_t *pvalid = s->s3->tmp.valid_flags;
     CERT *c = s->cert;
     TLS_SIGALGS *sigptr;
     if (!tls1_set_shared_sigalgs(s))
@@ -3890,7 +3890,7 @@
     int check_flags = 0, strict_mode;
     CERT_PKEY *cpk = NULL;
     CERT *c = s->cert;
-    int *pvalid;
+    uint32_t *pvalid;
     unsigned int suiteb_flags = tls1_suiteb(s);
     /* idx == -1 means checking server chains */
     if (idx != -1) {