Use the shared ResourcePool also for ad-hoc EffectChains.
Use the shared ResourcePool also for ad-hoc EffectChains.

We sometimes create an EffectChain just to get a temporary MLT image
into Movit. This, like any other, should use the ResourcePool.

A side-effect of this is that it serves as a temporary workaround
for Kdenlive bug 3253, since it delays the destruction of the
ResourcePool until the end of the program.

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