[PATCH] Allow collections and maps in maps

[Robert McQueen]

Rob Taylor wrote:
> Attached are two patches, one which adds code to allow the use of
> collections and maps as values in maps by making a GDestroyNotify
> function available for those types which know how to free themselves at
> runtime, and another that adds a testcase for this. I've valgrinded the
> tests and there appears to be no leaks.

Looks good to me, but I wrote most of the first patch with Rob, and got
him to write the tests for me. OK to commit? ;)

> Thanks,
> 
> Rob Taylor

Regards,
Rob