- 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

util.c

@@ -79,7 +79,7 @@ int is_id(const char *s)
 
 
 static struct unique {
-	const char *s;
+	char *s;
 	struct unique *next;
 } *uniques = NULL;
 
@@ -98,3 +98,17 @@ const char *unique(const char *s)
 	(*walk)->next = NULL;
 	return (*walk)->s;
 }
+
+
+void unique_cleanup(void)
+{
+	struct unique *next;
+
+	while (uniques) {
+		next = uniques->next;
+		free(uniques->s);
+		free(uniques);
+		uniques = next;
+	}
+}
+