[PATCH] ROX-Edit: use newer gtksourceview

The current implementation of ROX-Edit uses gtksourceview 1.x. The follow
patch makes it run with the newer 2.x versions of gtksourceview. I have
tested this against 2.6.0.

http://git.die.net.au/cgit/rox-edit/commit/?id=fb9bc484667e13c090d53a558c6407eaffab7a94

------------------------------------------------------------------------------
Crystal Reports - New Free Runtime and 30 Day Trial
Check out the new simplified licensing option that enables unlimited
royalty-free distribution of the report engine for externally facing 
server and web deployment.
http://p.sf.net/sfu/businessobjects