Bug#737487: marsshooter: segfaults when using the -cfg or -data arguments with no path given.

[Sylvain Boilard]

Package: marsshooter
Version: 0.7.5-1
Severity: normal
Tags: patch

Dear Maintainer,

When one tries to launch M.A.R.S. using the -cfg or -data arguments
without specifying a path after that argument, for example:

 $ mars -cfg

the game segfaults as the result of accessing the next element of
argv without verifying if it is at a valid index.

Attached patch solves the issue and displays an error message.

Best wishes.

-- 
Sylvain Boilard
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