rem: return errorInfo;
add: return (char*)errorInfo;
context: Ns_TclLogErrorRequest(Tcl_Interp *interp, Ns_Conn *conn){    char *agent;    CONST char *errorInfo;    errorInfo = Tcl_GetVar(interp, "errorInfo", TCL_GLOBAL_ONLY);    if (errorInfo == NULL) {        errorInfo = Tcl_GetStringResult(interp);    }    agent = Ns_SetIGet(conn->headers, "user-agent");    if (agent == NULL) {	agent = "?";    }    Ns_Log(Error, "error for %s %s, "           "User-Agent: %s, PeerAddress: %s\n%s",            conn->request->method, conn->request->url,	   agent, Ns_ConnPeer(conn), errorInfo);    return errorInfo;}