Image is shifted out of frame

[jlshin]

imreg_dft/src/imreg_dft/imreg.py

Lines 566 to 570 in 3eb7137

	if tvec[0] != 0 or tvec[1] != 0:
	dest0 = ndii.shift(dest0, tvec, order=order, mode=mode, cval=bgval)
	bg = np.zeros_like(img) + bgval
	dest = utils.embed_to(bg, dest0)

I ran into an issue where the shift applied dest0 shifted my image out of the frame resulting in a registered image that appears cropped. I moved lines 566-7 to after line 570 so that the shift operates on the dest variable after it has been embedded into the new background. Although this solution worked for my example, I am unsure if it will work in general.