Shifting and image causes it to be resized.

[Blockguy24]

I was having this issue with Image where if I did something like Image(5,6).shift_down(1), it would cause it to return an image of size 5x5 instead of 5x6. After looking through the code, I saw that the width was being passed twice into the blit function:

micropython/source/microbit/microbitimage.cpp

Lines 324 to 328 in a92ca9b

	greyscale_t *image_shift(microbit_image_obj_t *self, mp_int_t x, mp_int_t y) {
	greyscale_t *result = greyscale_new(self->width(), self->width());
	image_blit(self, result, x, y, self->width(), self->width(), 0, 0);
	return result;
	}

It looks like self->width(), self->width() should be replaced with self->width(), self->height() on lines 325 and 326 for this to function correctly.

[dpgeorge]

Fixed by 4cdc4ac