filters.c update
filters.c update

- correct sober format (w, h) and not (w-2, h-2)
- free(tmp) was missing

debug-de-su-ka/pal,eliteraspberries/pal,aolofsson/pal,8l/pal,parallella/pal,olajep/pal,mateunho/pal,debug-de-su-ka/pal,RafaelRMA/pal,8l/pal,Adamszk/pal3,mateunho/pal,mateunho/pal,debug-de-su-ka/pal,mateunho/pal,eliteraspberries/pal,Adamszk/pal3,RafaelRMA/pal,parallella/pal,eliteraspberries/pal,eliteraspberries/pal,debug-de-su-ka/pal,olajep/pal,8l/pal,aolofsson/pal,aolofsson/pal,parallella/pal,Adamszk/pal3,RafaelRMA/pal,olajep/pal,debug-de-su-ka/pal,olajep/pal,8l/pal,parallella/pal,parallella/pal,RafaelRMA/pal,aolofsson/pal,eliteraspberries/pal,Adamszk/pal3,mateunho/pal