Fix race condition when touching/changing a (theme) file often.
An Eio_Monitor was marked as "delete_me" but the rename callback
was still called, leading to memory access to already freed
objects.
Test protocol was:
ELM_THEME=~/default.edj elementary_test &
watch touch ~/default.edj
this MIGHT fix T45 but i can't reproduce to confirm, but reading a
backtrace indicates this could have been the issue. it looks like
there is room for a dangling pointer anyway, so fix.
stable release - cherry-pick me!