alloc: avoid arithmetic on void pointers.
[ccan] / ccan / foreach / _info
2011-03-21 Rusty Russellforeach: fix HAVE_FOR_LOOP_DECLARATION case.
2010-11-04 Rusty Russellantithread, foreach, grab_file, hashtable, str_talloc...
2010-11-02 Rusty Russellforeach: new module