more const/non-const stuff

[Tomas Ogren <stric ing umu se>]

Check the builtin_info struct on gtktypeutils.c:950

gtktypebuiltins_ids.c:4: warning: initialization discards `const' from
pointer target type
....

/Tomas
-- 
Tomas Ögren, stric@ing.umu.se, http://www.ing.umu.se/~stric/
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