Update GeSHi to 1.0.8.12 release

https://github.com/GeSHi/geshi-1.0/commit/d9cfd3e0cc9b24e6bd3045a4d222e651e68accd8

Already updated to 1 commit behind 1.0.8.12 release,
so this just tidies it up and brings it into line.

Change-Id: I2e8c4bc39844baf397547d824d7419fa25506f37
Merge "Update GeSHi to 1.0.8.12 release"