h264: Check all allocations

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
build: remove pointless condition

$(STRIP) always expands to something, because it is one of the commands
in the BRIEF list. This renders the condition pointless.

Signed-off-by: Ingo Brückl <ib@wupperonline.de>
Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>