rlm_perl compilation

[Joe Maimon]

interp is declared within ifdef ITHREADS but is referenced without at

rlm_perl.c:~760

Like so

         if (!interp) {
#ifdef USE_ITHREADS
                 if ((interp = perl_alloc()) == NULL) {
                         radlog(L_DBG, "rlm_perl: No memory for 
allocating new perl !");
                         return -1;
                 }

                 perl_construct(interp);
                 PL_perl_destruct_level = 2;
#endif
         }