Bug in boxFilter

[JesseYang]

in cv/imgproc/init.lua

Now line 586-588:

C.boxFilter( cv.wrap_tensor(src), cv.wrap_tensor(dst), ddepth, ksize[1], ksize[2], anchor, normalize, borderType))

When I use cv.boxFilter, it always complains: ...cv/imgproc/init.lua:587: 'struct SizeWrapper' cannot be indexed with 'number'

I change line 586-588 as below and it works::

C.boxFilter( cv.wrap_tensor(src), cv.wrap_tensor(dst), ddepth, ksize, anchor, normalize, borderType))

[shrubb]

@JesseYang
Thank you!