Fix missing warning when port is unsized.

This patch fixes an incorrect optimization that was skipping a
call to set the port width when there was no width (a scalar).
The problem with this is that since a (0,0) pair was not added
to the list, later when the width was define to (1,0) the checking
code did not have the (0,0) to tell that there was a mismatch in
the port size. Section 12.3.3 States that the two sizes shall be
identical, so yes this is an error even though it is very minor.

pform.cc

@@ -1694,8 +1694,7 @@ void pform_set_port_type(const struct vlltype&li,
 		 ; cur ++ ) {
 	    perm_string txt = *cur;
 	    pform_set_port_type(txt, pt, li.text, li.first_line);
-	    if (range)
-		  pform_set_net_range(txt, range, signed_flag, IVL_VT_NO_TYPE);
+	    pform_set_net_range(txt, range, signed_flag, IVL_VT_NO_TYPE);
       }
 
       delete names;