Bug#1088989: Acknowledgement (memory leak in terminator)

[VA]

After an intuition, it seems the problem is much more noticeable if a 
background image is set in terminator settings.
Without a background image, the memory is still leaking though, i.e. not 
freed when closing the tab/split, but each empty tab/split adds up much 
less memory (I'd say about 2 orders of magnitude) without an image than 
with an image.