modules/mappers/mod_negotiation.c:458: error: UNINITIALIZED_VALUE
  The value read from end was never initialized.

modules/mappers/mod_negotiation.c:458:34: 
456.         /* Look for 'var = value' --- and make sure the var is in lcase. */
457. 
458.         for (cp = parm; (*cp && !apr_isspace(*cp) && *cp != '='); ++cp) {
                                      ^
459.             *cp = apr_tolower(*cp);
460.         }
