i965_drv_video: make VADriverContext.vtable a pointer.
i965_drv_video: make VADriverContext.vtable a pointer.

chenxianqin/vaapi-libva,zzhhui/libva,pma1/libva,CyanogenMod/android_hardware_intel_libva,Distrotech/libva,01org/libva-cros,CyanogenMod/android_hardware_intel_libva,zzhhui/libva,android-ia/hardware_intel_libva,gbeauchesne/libva,halleyzhao/libva-fdo,pma1/libva,chenxianqin/vaapi-libva,zzhhui/libva,01org/iotg-lin-gfx-libva,01org/iotg-lin-gfx-libva,01org/libva-cros,halleyzhao/libva-fdo,Distrotech/libva,gbeauchesne/libva,01org/iotg-lin-gfx-libva,android-ia/hardware_intel_libva,gbeauchesne/libva,halleyzhao/libva-fdo,chenxianqin/vaapi-libva,Distrotech/libva,android-ia/hardware_intel_libva,01org/libva-cros,pma1/libva,CyanogenMod/android_hardware_intel_libva