t79: changed CM_Request_Abstract::getDeviceCapabilities() to use and empty string as argument for CM_DeviceCapailities constructor if user-agent header is not set
t79: changed CM_Request_Abstract::getDeviceCapabilities() to use and empty string as argument for CM_DeviceCapailities constructor if user-agent header is not set

fvovan/CM,zazabe/cm,fauvel/CM,alexispeter/CM,alexispeter/CM,christopheschwyzer/CM,fauvel/CM,zazabe/cm,tomaszdurka/CM,christopheschwyzer/CM,njam/CM,fvovan/CM,fauvel/CM,christopheschwyzer/CM,tomaszdurka/CM,cargomedia/CM,cargomedia/CM,cargomedia/CM,vogdb/cm,alexispeter/CM,tomaszdurka/CM,zazabe/cm,fauvel/CM,cargomedia/CM,fauvel/CM,vogdb/cm,vogdb/cm,njam/CM,zazabe/cm,fvovan/CM,fvovan/CM,christopheschwyzer/CM,mariansollmann/CM,alexispeter/CM,tomaszdurka/CM,mariansollmann/CM,njam/CM,njam/CM,mariansollmann/CM,mariansollmann/CM,vogdb/cm,tomaszdurka/CM,vogdb/cm,njam/CM