remember mapped rules state

Signed-off-by: Kay Sievers <kay.sievers@suse.de>

udev_rules.c

@@ -606,8 +606,8 @@ found:
 			pos = getenv(attr);
 			if (pos == NULL)
 				break;
-			strlcat(string, pos, maxsize);
 			dbg("substitute env '%s=%s'", attr, pos);
+			strlcat(string, pos, maxsize);
 			break;
 		default:
 			err("unknown substitution type=%i", type);

udev_rules_parse.c

@@ -548,6 +548,7 @@ static int rules_map(struct udev_rules *rules, const char *filename)
 		rules->buf = NULL;
 		return -1;
 	}
+	rules->mapped = 1;
 
 	return 0;
 }