Suppress GCC 14 allocation size warning in lcptools-v2/pconf_legacy.c

Submitted upstream: <https://sourceforge.net/p/tboot/mailman/message/58730242/>

diff --git a/lcptools-v2/pconf_legacy.c b/lcptools-v2/pconf_legacy.c
index 443b5cd5525b9fe1..5ebc6c451f7008b1 100644
--- a/lcptools-v2/pconf_legacy.c
+++ b/lcptools-v2/pconf_legacy.c
@@ -324,7 +324,7 @@ static lcp_policy_element_t *create(void)
             ERROR("Error: no pcrs were selected.\n");
             return NULL;
         }
-        digest = malloc(SHA1_DIGEST_SIZE);
+        digest = malloc(sizeof(*digest));
         if (digest == NULL) {
             ERROR("Error: failed to allocate memory for digest buffer.\n");
             return NULL;