Memory keep increase in gst-play-1.0

Submitted by Ung, Teng En

Link to original bug (#796449)

Description

We use gst-play-1.0 to play through a playlist. We notice when it finish current video and continue to next video, the RES will increase. Until certain point it just remain there. Here is the command :-
gst-play-1.0 --playlist=test.list

Although the patch we try fix previous issue (https://bugzilla.gnome.org/show_bug.cgi?id=790472).

We just like to know what cause the RES memory keep increasing.

Version: 1.12.x