Broken drawRect around image borders

[vadimkantorov]

img = image.lena()
image.drawRect(img, 1, img:size(2), 1, img:size(2), {lineWidth = 5})

should make a thick boundary around the image, but fails with:

...share/lua/5.1/image/init.lua:2172: bad argument #2 to 'drawRect' (out of range at ...src/torch/pkg/torch/lib/TH/generic/THTensor.c:759)
stack traceback:
	[C]: in function 'drawRect'
	.../share/lua/5.1/image/init.lua:2172: in function 'drawRect'
	[string "_RESULT={image.drawRect(a, 1, 512, 1, 512, {l..."]:1: in main chunk
	[C]: in function 'xpcall'
	.../share/lua/5.1/trepl/init.lua:652: in function 'repl'
	.../lib/luarocks/rocks/trepl/scm-1/bin/th:199: in main chunk
	[C]: at 0x00411210