vdec: Fix qbuf failure during video call surface switch.

During component transition from Idle->Loaded, extradata buffer
will be deallocated and extradata structure is memset to zero.
If client moves component again to Idle with same resolution, Extradata
buffer will not be allocated since extrabuffer size is zero.
Further FTB fails if extradata plane is NULL.

So fix is added to retain extradata buffer size.

Change-Id: I1bdf4a6c85b4210f1544b3d74dfd8b1e51fc4954
1 file changed