Fix phased genotype for VcfSample's gti
Fix phased genotype for VcfSample's gti

pjotrp/bioruby-vcf,gusevfe/bioruby-vcf,gusevfe/bioruby-vcf,pjotrp/bioruby-vcf,pjotrp/bioruby-vcf,CuppenResearch/bioruby-vcf,CuppenResearch/bioruby-vcf,CuppenResearch/bioruby-vcf,gusevfe/bioruby-vcf