[SDL] minor fix for gcc-2.x building

[Sam Lantinga]

> in src/video/directfb/SDL_DirectFB_video.c, some variables are not declared at 
> the beginning of scope ... newer gcc's will accept this, but gcc-2.x does not

> find attached a simple patch by Matt Taylor to resolve this
> http://bugs.gentoo.org/show_bug.cgi?id=75392

Thanks, this patch is in CVS.

See ya,
	-Sam Lantinga, Software Engineer, Blizzard Entertainment