This patch fixes GCC4 compilation errors in osdcontroller.h from the DVB
subtitles patch. Applies after DVBsubs.patch, obviously.
(Yep, GCC4 is not out yet, I'm testing a pre-release version. Anyway,
it reports quite a few more warnings with various plugins than earlier
versions, plugin authors might be interested in having a look... the
subtitles plugin is the only one I've found that didn't compile yet.)