Fix AuditLog change deserialisation for permissions (serenity-rs#2717)

src/model/permissions.rs

@@ -800,11 +800,23 @@ impl Permissions {
     }
 }
 
-// Manual impl needed because Permissions are sent as a stringified integer
+// Manual impl needed because Permissions are usually sent as a stringified integer,
+// but audit log changes are sent as an int, which is probably a problem.
 impl<'de> Deserialize<'de> for Permissions {
     fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
-        let permissions_str = String::deserialize(deserializer)?;
-        let permissions_num = permissions_str.parse().map_err(DeError::custom)?;
+        #[derive(serde::Deserialize)]
+        #[serde(untagged)]
+        enum StrOrInt<'a> {
+            Str(&'a str),
+            String(String),
+            Integer(u64),
+        }
+
+        let permissions_num = match StrOrInt::deserialize(deserializer)? {
+            StrOrInt::String(permissions) => permissions.parse().map_err(DeError::custom)?,
+            StrOrInt::Str(permissions) => permissions.parse().map_err(DeError::custom)?,
+            StrOrInt::Integer(permissions) => permissions,
+        };
 
         Ok(Permissions::from_bits_truncate(permissions_num))
     }