- inst.c: cleanup_inst leaked memory when using special pads

- changed pad classification in instances from bare/other to copper/special
- moved LAYER_* definitions from layer.h to layer.c
- after instantiation, we perform sanity checks on pads and remove layers from
  coppery pads that are handled by a special layer
- fped.y: the line number in objects was never set
- overlap.c: fixed overlap calculations
- gui_tool.c: end_new_pad didn't initialize the pad type



git-svn-id: http://svn.openmoko.org/trunk/eda/fped@5635 99fdad57-331a-0410-800a-d7fa5415bdb3

obj.c

@@ -20,6 +20,7 @@
 #include "expr.h"
 #include "meas.h"
 #include "inst.h"
+#include "layer.h"
 #include "delete.h"
 #include "obj.h"
 
@@ -303,6 +304,8 @@ int instantiate(void)
 	instantiation_error = NULL;
 	reset_all_loops();
 	ok = generate_frame(root_frame, zero, NULL, NULL, 1);
+	if (ok)
+		ok = refine_layers();
 	if (ok)
 		ok = instantiate_meas();
 	if (ok)