Added a drc check to the gencell change procedure, as it appears

that otherwise DRC is not re-checked after a gencell update.  It
is not clear to me why checks are not done otherwise.

VERSION

@@ -1 +1 @@
-8.3.568
+8.3.569

tcltk/toolkit.tcl

@@ -893,6 +893,7 @@ proc magic::gencell_change {instname gencell_type library parameters} {
     }
 
     resumeall
+    drc check	;# force a DRC update if DRC is on.
     redraw
 }