Track statistics may contain a negative time

Depending on request, BRouter may output a negative time in track statistics. BRouter server command line: ``` java @brouter.args ``` where file _brouter.args_ is ... ``` -Xmx128M -Xms128M -Xmn8M -DmaxRunningTime=0 -DuseRFCMimeType=false -cp D:/Landkarten/BRouter/brouter-1.7.8-all.jar btools.server.RouteServer D:/Landkarten/BRouter/segments4 D:/Landkarten/BRouter/profiles2 D:/Landkarten/BRouter/profiles2 17778 4 127.0.0.1 ``` ... _segments4_ folder contains today's _rd5_ files and _profiles2_ folder contains downloaded and unmodified profiles. BRouter request command line: ``` curl -K brouter.request ``` where file _brouter.request_ is ``` url=http://127.0.0.1:17778/brouter?profile=car-eco&alternativeidx=0&format=gpx&exportWaypoints=0&timode=6&lonlats=-6.37167274,39.47767499|-6.37166786,39.47769547|-6.37169123,39.47769928|-6.37192011,39.47774887|-6.37209606,39.47782898|-6.37206602,39.47786331|-6.37181711,39.47814941|-6.37172222,39.47811127|-6.37128592,39.47810364|-6.37088585,39.47809982|-6.37077713,39.47823715|-6.37030315,39.47885513|-6.37028122,39.47890472|-6.37028122,39.47895432|-6.37028885,39.47898102|-6.37031889,39.47900772|-6.37049913,39.47907257|-6.37052917,39.47910690|-6.37053823,39.47912979|-6.37054586,39.47915268|-6.37050200,39.47930145|-6.37050915,39.47933578|-6.36990213,39.47944260|-6.36979008,39.47948074|-6.36950016,39.47950745|-6.36937714,39.47950363|-6.36924219,39.47942352|-6.36887217,39.47928238|-6.36844492,39.47912216|-6.36787987,39.47891617|-6.36776304,39.47885895|-6.36736107,39.47861481|-6.36727810,39.47856522|-6.36717796,39.47851944|-6.36689806,39.47849274|-6.36682510,39.47848892|-6.36665392,39.47845840|-6.36631918,39.47833633|-6.36621809,39.47833252|-6.36602688,39.47838211|-6.36540604,39.47866821|-6.36530018,39.47872162|-6.36523581,39.47872162|-6.36518288,39.47869492|-6.36518097,39.47864914|-6.36516523,39.47862244|-6.36505413,39.47869873|-6.36488390,39.47880173|-6.36459398,39.47898102|-6.36430311,39.47916031|-6.36326599,39.47972488|-5.88145699,39.45726179|-5.71872424,39.45452742|-5.57243219,39.48527870|-5.32698090,39.45391425|-6.33278172,38.91496784 ``` Track statistics: ``` <!-- track-length = 247682 filtered ascend = 1865 plain-ascend = -187 cost=299418 energy=19.6kwh time=-61h -44m -30s --> ```