module_invoke_all() does not merge recursive arrays

This issue affects theme_token_help() when two or more token_list() hooks returns tokens for the same category. array_merge() will then overwrite the previous entries for that category instead of appending them. For some unknown reason array_merge_recursive() didn't work either, therefore the result array is built manually.

Example:
foo_token_list() returns $tokens['user']['some-token'];
bar_token_list() returns $tokens['user']['another-token'];
Then theme_token_help() will only list another-token.

This is a requirement for the upcoming profile.module support.
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Stefan Kudwien
www.unleashedmind.com