tsocket: we return -1 on error, not fd

tsocket: we return -1 on error, not fd

the code used this pattent:

 if (fd < 0) {
   ...various cleanups...
   return fd;
 }

it is much clearer to do this:

 if (fd < 0) {
   ...various cleanups...
   return -1;
 }

as otherwise when reading the code you think this function may return
a fd.

Pair-Programmed-With: Andrew Bartlett <abartlet@samba.org>