Final cropped image doesn't have always the exact width and height

I'm using imagecrop to crop big images 1000x750 pixels to a final size of 630x300 px

Some times I get images of 629x300 or 630x299. In some part of the code I lost 1pixel in one of the dimensions maybe due to some rounding.

I managed to fix it changing the image_scale imageapi call in the image_scale_and_crop function for a image_scale_and_crop call to ensure the exact final image size.

Now I'm getting always the exact final size.

Maybe is useful to make this change in the main branch.