Don't crash on an empty vcf #200
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Hi folks,
In
samplot vcf, the accumulator variable for the number of parsed variants usesenumerate(), which means that thevar_countvariable wasn't define if there were no variants in the file. Likely, an empty vcf should be an error that is reported somewhere, but for now I at least define the variable so as not to get a rather inscrutableNameError.Thanks
K