add stream channel type checking
add stream channel type checking

vogdb/cm,tomaszdurka/CM,vogdb/cm,cargomedia/CM,fauvel/CM,tomaszdurka/CM,vogdb/cm,njam/CM,alexispeter/CM,cargomedia/CM,alexispeter/CM,alexispeter/CM,njam/CM,fauvel/CM,njam/CM,tomaszdurka/CM,vogdb/cm,tomaszdurka/CM,tomaszdurka/CM,fauvel/CM,fauvel/CM,vogdb/cm,njam/CM,alexispeter/CM,cargomedia/CM,njam/CM,fauvel/CM,cargomedia/CM