Check for buffer overflow for rail/lightning surfaces
Fix check for jpeg_mem_ to work with libjpeg-turbo
Merge pull request #34 from robo9k/issue/libjpeg-turbo

Fix check for jpeg_mem_ to work with libjpeg-turbo
Try default OpenAL driver if user set one fails to load
Merge branch 'master' of https://github.com/ioquake/ioq3