Consistent formatting for sizeof(foo)

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/4872)
diff --git a/ssl/ssl_cert.c b/ssl/ssl_cert.c
index 7b89608..c8b9eff 100644
--- a/ssl/ssl_cert.c
+++ b/ssl/ssl_cert.c
@@ -729,15 +729,15 @@
         char buf[1024];
         int r;
 
-        if (strlen(dir) + strlen(filename) + 2 > sizeof buf) {
+        if (strlen(dir) + strlen(filename) + 2 > sizeof(buf)) {
             SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,
                    SSL_R_PATH_TOO_LONG);
             goto err;
         }
 #ifdef OPENSSL_SYS_VMS
-        r = BIO_snprintf(buf, sizeof buf, "%s%s", dir, filename);
+        r = BIO_snprintf(buf, sizeof(buf), "%s%s", dir, filename);
 #else
-        r = BIO_snprintf(buf, sizeof buf, "%s/%s", dir, filename);
+        r = BIO_snprintf(buf, sizeof(buf), "%s/%s", dir, filename);
 #endif
         if (r <= 0 || r >= (int)sizeof(buf))
             goto err;