Fix regression loading profile.
Fix regression loading profile.

Also, prefer mlt_environment(MLT_DATA) over $datadir to make indirection
possible with MLT_DATA environment variable and to be consistent with
mlt_profile_list().

gmarco/mlt-orig,siddharudh/mlt,wideioltd/mlt,gmarco/mlt-orig,zzhhui/mlt,anba8005/mlt,j-b-m/mlt,xzhavilla/mlt,mltframework/mlt,wideioltd/mlt,siddharudh/mlt,mltframework/mlt,wideioltd/mlt,xzhavilla/mlt,gmarco/mlt-orig,siddharudh/mlt,j-b-m/mlt,anba8005/mlt,gmarco/mlt-orig,j-b-m/mlt,gmarco/mlt-orig,zzhhui/mlt,wideioltd/mlt,mltframework/mlt,wideioltd/mlt,anba8005/mlt,xzhavilla/mlt,j-b-m/mlt,zzhhui/mlt,wideioltd/mlt,anba8005/mlt,zzhhui/mlt,gmarco/mlt-orig,siddharudh/mlt,j-b-m/mlt,anba8005/mlt,wideioltd/mlt,siddharudh/mlt,j-b-m/mlt,xzhavilla/mlt,mltframework/mlt,mltframework/mlt,xzhavilla/mlt,siddharudh/mlt,mltframework/mlt,zzhhui/mlt,anba8005/mlt,gmarco/mlt-orig,j-b-m/mlt,gmarco/mlt-orig,anba8005/mlt,zzhhui/mlt,wideioltd/mlt,siddharudh/mlt,zzhhui/mlt,mltframework/mlt,j-b-m/mlt,xzhavilla/mlt,anba8005/mlt,gmarco/mlt-orig,mltframework/mlt,mltframework/mlt,siddharudh/mlt,j-b-m/mlt,xzhavilla/mlt,zzhhui/mlt,wideioltd/mlt,mltframework/mlt,xzhavilla/mlt,zzhhui/mlt,j-b-m/mlt,siddharudh/mlt,anba8005/mlt,xzhavilla/mlt