initialise the element->type value so TAG types dont accidently get VIEWPORT if it element->type == 0 at alloc time


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26825 a1c6a512-1295-4272-9138-f99709370657
diff --git a/utils/themeeditor/skin_parser.h b/utils/themeeditor/skin_parser.h
index c15ba9d..1fc4a7a 100644
--- a/utils/themeeditor/skin_parser.h
+++ b/utils/themeeditor/skin_parser.h
@@ -35,6 +35,7 @@
 /* Possible types of element in a WPS file */
 enum skin_element_type
 {
+    UNKNOWN = -1,
     VIEWPORT,
     LINE,
     SUBLINES,