Corrected a crash condition in R-C extraction (extresist) caused

by old code that still references devices like FETs assuming
four ports.  I resolved the crash condition but have not worked
on fixing the code to properly handle a variable number of
terminals per device.

VERSION

@@ -1 +1 @@
-8.3.632
+8.3.633

resis/ResRex.c

@@ -1356,7 +1356,7 @@ ResFixUpConnections(extDev, layoutDev, extNode, nodename)
     }
     if (extDev->subs == extNode)
     {
-	if ((subs = layoutDev->rd_fet_subs) != NULL)
+	if ((layoutDev->rd_nterms >= 4) && ((subs = layoutDev->rd_fet_subs) != NULL))
 	{
 	    if (subs->rn_name != NULL && notdecremented)
 	    {

resis/ResSimple.c

@@ -386,7 +386,7 @@ ResMoveDevices(node1, node2)
 	devptr = devptr->te_nextt;
 	if (device->rd_fet_gate == node1)
    	    device->rd_fet_gate = node2;
-	else if (device->rd_fet_subs == node1)
+	else if ((device->rd_nterms >= 4) && (device->rd_fet_subs == node1))
    	    device->rd_fet_subs = node2;
 	else if (device->rd_fet_source == node1)
 	    device->rd_fet_source = node2;