fix jack-stopped event with some JACK clients
fix jack-stopped event with some JACK clients

It appears that JackTransportStopped is not received in JackSyncCallback
unless the client that calls jack_transport_stop() also calls
jack_transport_locate().

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