Corrected a problem with extresist in which node names are not

transferred when doing a node merge, which can cause named
terminals to get lost, because there is no longer a node with
a name corresponding to the terminal.  The node gets a default
name which is not the terminal name, and the netlist is broken.

resis/ResMerge.c

@@ -742,6 +742,9 @@ ResMergeNodes(node1, node2, pendingList, doneList)
 	node1->rn_ce = tCon;
     }
 
+    /* Moves name to new node, if new node does not have a name */
+    if (node1->rn_name == NULL) node1->rn_name = node2->rn_name;
+
     /* Moves resistors to new node  */
 
     workingRes = node2->rn_re;