Fix leak in complete() callback of Database.each() #307
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Add destructor to EachBaton that disposes the
completed
callback function.Fixes #297.
I didn't implement the part of my previous patch that prevented the duplication of the callback handles in
Statement::Work_BeginEach
because 1. it's not strictly necessary and 2. I don't understand enough of this nan stuff to be confident to do it right.I've checked (using node v0.10.22) that 1. the memory leak still exists in current HEAD and 2. this patch fixes it.