Fix handling of length parameter in mlt_playlist_remove_region.
Fix handling of length parameter in mlt_playlist_remove_region.

This fixes kdenlive bug 1030.
The calls to mlt_playlist_split() inside this function appear to have forgotten that it splits _after_ the specified position.

Signed-off-by: Dan Dennedy <2591e5f46f28d303f9dc027d475a5c60d8dea17a@dennedy.org>

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