empty a dict before processing each genome to not accumulate useless information

main.py

@@ -64,3 +64,4 @@ for target_genome in args.target:
     out_aln=target_genome+"/"+target_genome+"_aln.txt"
 
     transfer_on_target(segments,out_target_gff,out_target_var,out_aln,target_genome,target_genome_paths,args)
+    segments_on_target_genome={} # empty dict