typedef uint MsgId; //!< Identifies a message.
typedef uint BufferId; //!< Identifies a buffer.
typedef uint NetworkId; //!< Identifies an IRC Network.
-typedef quint32 IdentityId; //!< Identifies an identity.
+// IdentityId must be signed!
+typedef qint32 IdentityId; //!< Identifies an identity.
//! Base class for exceptions.
struct Exception {