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Jovan Kostovski c691ee06f0 show help and exit if no argument is provided
Signed-off-by: Jovan Kostovski <chombium@gmail.com>

bugfix for the case where the script was started without an argument.
The help was printed, but the _mainflux_docker was called as well, which
was causing the following error:
./mainflux-docker.sh: line 163: $1: unbound variable
2018-02-06 01:48:38 +01:00
..
2018-02-06 01:48:38 +01:00