samtools version checking

[rcorty]

HLA-LA/HLA-LA.pl

Lines 215 to 218 in 42fe1d4

	unless($samtools_version_major > 1 or ($samtools_version_major == 1 and $samtools_version_minor >= 3))
	{
	die "I need samtools >=1.3";
	}

This fails for the current version of samtools (1.21)

Could replace with something that looks only at minor version like

if ($samtools_version =~ /^1\.(\d+)/) {
    my $minor = $1;
    if ($minor < 3) {
        die "I need samtools >=1.3 (found 1.$minor)";
    }
}

But I am not much of a perl programmer so there may be a better fix