Remove memory leak in the 'show' command.

Needs some more testing, as val is not always instanciated by malloc.

src/frontend/device.c

@@ -1002,6 +1002,8 @@ printvals_old(dgen *dg, IFparm *p, int i)
     IFvalue     val;
     int         n, error;
 
+    memset(&val, 0, sizeof val);
+
     if (dg->flags & DGEN_INSTANCE)
         error = ft_sim->askInstanceQuest
             (ft_curckt->ci_ckt, dg->instance, p->id, &val, &val);
@@ -1081,6 +1083,8 @@ printvals_old(dgen *dg, IFparm *p, int i)
             fprintf(cp_out, " %*.*s", DEV_WIDTH, DEV_WIDTH, " ******** ");
         }
     }
+    if (p->dataType & IF_VECTOR)
+        tfree(val.v.vec.rVec);
 
     return n - 1;
 }