mlt_cache.c: watch out for null pointer
mlt_cache.c: watch out for null pointer

Fixes Coverity CID 709346: Dereference after null check (FORWARD_NULL)
Comparing "result" to null implies that "result" might be null.
449                if ( result && result->data )
450                        result->refcount++;
Dereferencing null variable "result".
451                mlt_log( NULL, MLT_LOG_DEBUG, "%s: get %d = %p, %p\n", __FUNCTION__, cache->count - 1, *hit, result->data );
452

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