vlm: fix error message / uninitialized variable
http: fix corner case memory leaks

STANDARD_READ_ACCESS_INIT is an evil macro.
Also the forward-cookies setting could change, hence inherit -> create-get.
OpenCV: array identifier cannot be NULL
lib: avoid NULL deref on error
JACK: remove tautology

p_sys cannot be NULL here.
ios2_vout: fix potential texture resizing issue if the UIView changes its shape (close #11081)
taglib: fix potential NULL dereference
RAOP: NULL dereference on error path
SAP: NULL dereference on error path
Smooth: remove tautology

sms cannot be NULL here.
zip: NULL dereference
transcode: NULL check
ALSA input: cope with EINTR