epoloader dont work for negative locations

[lsaavedr]

If you see: https://bugs.python.org/issue9334 you can check why epoader fail to parse (for example):

# epoloader -l -38.889468,-77.352420,5 -t- /tmp/MTK14.EPO /dev/ttyUSB1

a workaround is to use "=" an equals sign:

# epoloader -l=-38.889468,-77.352420,5 -t- /tmp/MTK14.EPO /dev/ttyUSB1

but that's a litle awful, thanks for you good work! Luis