Merge pull request #1446 from sijchen/for_format

[Encoder] fix a small range of slice idx
Add casts to avoid warnings about comparison between signed and unsigned
Merge pull request #1448 from sijchen/for_format

roll back the file which is mis-formatted by astyle
Merge pull request #1450 from mstorsjo/avoid-warnings

Add casts to avoid warnings about comparison between signed and unsigned
Merge branch 'master' of https://github.com/cisco/openh264 into for_format
add parentheses