gstring *
string_vformat_trc(gstring * g, const uschar * func, unsigned line,
unsigned size_limit, unsigned flags, const char *format, va_list ap)
{ return NULL; }
gstring *
string_vformat_trc(gstring * g, const uschar * func, unsigned line,
unsigned size_limit, unsigned flags, const char *format, va_list ap)
{ return NULL; }