- delete.c: added more destructor functions

- deallocate all our data structures on exit (to help find memory leaks, bad
  pointers, and general logic errors)
- fixed memory leak when allocating pad names in instantiation
- added "magic" environment variable FPED_NO_GUI to run fped without 
  initializing Gtk+
- added valgrind wrapper "leakcheck"
- delete.c: destroy() now requires a deletion to exist
- vacate_op: free string expressions
- destroy_obj: free measurement labels
- delete_references: use do_delete_obj so the we don't bump the group number
- delete_frame: delete references after deleting the frame itself, so they end
  up on the stack above the frame and get destroyed first
- do_delete_vec: like above, even though it doesn't matter here



git-svn-id: http://svn.openmoko.org/trunk/eda/fped@5506 99fdad57-331a-0410-800a-d7fa5415bdb3

obj.c

@@ -20,6 +20,7 @@
 #include "expr.h"
 #include "meas.h"
 #include "inst.h"
+#include "delete.h"
 #include "obj.h"
 
 
@@ -288,3 +289,16 @@ int instantiate(void)
 		inst_revert();
 	return ok;
 }
+
+
+/* ----- deallocation ------------------------------------------------------ */
+
+
+void obj_cleanup(void)
+{
+	free(pkg_name);
+	while (frames) {
+		delete_frame(frames);
+		destroy();
+	}
+}