videodec: Fix for file-to-file / non-strided buffers.
videodec: Fix for file-to-file / non-strided buffers.

If we get nOffset values, for cropping the output, but rowstride==0, that will
cause divide-by-zero errors (SIGFPE).

Signed-off-by: Daniel Diaz <ed054987dd20aebbd314fbb0d175066628f13717@ti.com>

mrchapp/gst-openmax-devel,mrchapp/gst-openmax-devel,mrchapp/gst-openmax-devel,mrchapp/gst-openmax,mrchapp/gst-openmax,mrchapp/gst-openmax