inp2m.c, do not restrict binning to four nodes

until now, for unknown reasons,
  the search for binned modelnames was restricted to
  instances with less than five nodes.

src/spicelib/parser/inp2m.c

@@ -96,7 +96,7 @@ INP2M(CKTcircuit *ckt, INPtables *tab, card *current)
         txfree(INPgetMod(ckt, nname[i], &thismodel, tab));
 
         /* check if using model binning -- pass in line since need 'l' and 'w' */
-        if (!thismodel && i < 5)
+        if (!thismodel)
             txfree(INPgetModBin(ckt, nname[i], &thismodel, tab, line));
 
         if (thismodel)