swscale: fix ticket #4881
authorPedro Arthur <bygrandao@gmail.com>
Tue, 13 Oct 2015 16:32:07 +0000 (13:32 -0300)
committerPedro Arthur <bygrandao@gmail.com>
Tue, 13 Oct 2015 16:43:39 +0000 (13:43 -0300)
commit5bd62a1b3c3356b84818efca3fcaf52da27a32af
tree315f041e83eb44beeead3d743a5f2b4d79a5fca3
parentde262d018d7d7d9c967af1dfd1b861c4b9eb2a60
swscale: fix ticket #4881

When scaling only a slice of a frame the output was written always
in the first lines leaving the rest of the frame black.
libswscale/slice.c
libswscale/swscale.c
libswscale/swscale_internal.h