libgst: Restore the memcpy from the error handling

In commit 82cc48d70b044b49b4872546244aaea088be290e the error
handling was improved and the "old_recover" was improved. In commit
fa4cc8504de1387cc56c07a91c49041fe1dd0b31 the memcpy was removed.
The current code copies random data from the stack into the
p->recover. Restore the initial memcpy.

Fixes: Coverity CID 1040797

2013-11-22  Holger Hans Peter Freyther  <holger@moiji-mobile.com>

	* gst-parse.c: Initialize the old_recover.