test not only if header frei0r.h exists, also use an itemmaster
treecc3b2075d9049ba7a6243e35c76e4dc77a159ad7
drwxr-xr-x - mlt++
drwxr-xr-x - mlt
drwxr-xr-x - shotcut
drwxr-xr-x - vizinni