vf_drawbox: avoid declaration in for() arguments

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
vf_drawbox: give all v_log() a context

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/cllc: Fix clobbered ff_get_buffer() change

Issue-since: 9328ae484338b70a7f2dbcd420bbbac499df76cc

Found-by: Daemon404
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>