Fix distorting aspect ratio of images with crop.
Fix distorting aspect ratio of images with crop.

Unfortunately, this has the side effect of breaking the crop extents of
existing projects when crop was applied to an image or image sequence.
However, those projects were using a distorting version of crop and
would need to be revised anyways.

anba8005/mlt,ttill/MLT-roto-tracking,gmarco/mlt-orig,wideioltd/mlt,xzhavilla/mlt,ttill/MLT-roto,ttill/MLT-roto-tracking,ttill/MLT-roto-tracking,siddharudh/mlt,ttill/MLT-roto,ttill/MLT,j-b-m/mlt,ttill/MLT,mltframework/mlt,xzhavilla/mlt,gmarco/mlt-orig,zzhhui/mlt,mltframework/mlt,wideioltd/mlt,xzhavilla/mlt,ttill/MLT,xzhavilla/mlt,ttill/MLT,anba8005/mlt,anba8005/mlt,zzhhui/mlt,ttill/MLT,zzhhui/mlt,siddharudh/mlt,ttill/MLT-roto-tracking,zzhhui/mlt,j-b-m/mlt,anba8005/mlt,ttill/MLT,ttill/MLT,j-b-m/mlt,ttill/MLT,mltframework/mlt,ttill/MLT-roto,wideioltd/mlt,ttill/MLT-roto-tracking,xzhavilla/mlt,ttill/MLT-roto-tracking,mltframework/mlt,gmarco/mlt-orig,zzhhui/mlt,ttill/MLT-roto,wideioltd/mlt,gmarco/mlt-orig,xzhavilla/mlt,ttill/MLT-roto-tracking,siddharudh/mlt,zzhhui/mlt,mltframework/mlt,mltframework/mlt,mltframework/mlt,mltframework/mlt,gmarco/mlt-orig,ttill/MLT-roto,ttill/MLT-roto,zzhhui/mlt,wideioltd/mlt,mltframework/mlt,siddharudh/mlt,j-b-m/mlt,ttill/MLT-roto,ttill/MLT-roto,ttill/MLT-roto-tracking,ttill/MLT-roto-tracking,siddharudh/mlt,j-b-m/mlt,anba8005/mlt,j-b-m/mlt,siddharudh/mlt,j-b-m/mlt,xzhavilla/mlt,gmarco/mlt-orig,j-b-m/mlt,xzhavilla/mlt,wideioltd/mlt,j-b-m/mlt,anba8005/mlt,siddharudh/mlt,zzhhui/mlt,wideioltd/mlt,gmarco/mlt-orig,zzhhui/mlt,xzhavilla/mlt,j-b-m/mlt,siddharudh/mlt,gmarco/mlt-orig,mltframework/mlt,wideioltd/mlt,anba8005/mlt,anba8005/mlt,anba8005/mlt,siddharudh/mlt,ttill/MLT,gmarco/mlt-orig,ttill/MLT-roto,wideioltd/mlt