add some protection on rc module
fix typo
Merge pull request #1089 from ruil2/rc_fix_1

    add some protection on rc module
Remove warning
Merge pull request #1090 from HaiboZhu/Debug_ExpandBsBuffer

Remove warning
LTR feedback check in decoder
Merge pull request #1093 from huili2/ec_return_error

LTR feedback check in decoder
bEnableSceneChangeDetect should be true for screen content
Merge pull request #1095 from ruil2/rc_fix_1

bEnableSceneChangeDetect should be true for screen content
use grey instead of green in EC without ref
Merge pull request #1094 from huili2/ec_grey_replace_green

use grey instead of green in EC without ref