[vdr] fix for streamdev (CVS-HEAD) and gcc 4.0.X

[Dominique Dumont]

Deti Fliegl <deti at fliegl.de> writes:

> streamdev from CVS does not compile with gcc 4.0.X - (at least on SuSE 
> 10). There was a missing declaration:

Thanks a bunch :-) Your patch also works on Debian sid.