make sure the svsize could be positive values
make sure the svsize could be positive values

ShujiaHuang/AsmVar,ShujiaHuang/AsmVar,bioinformatics-centre/AsmVar,ShujiaHuang/AsmVar,bioinformatics-centre/AsmVar,ShujiaHuang/AsmVar,ShujiaHuang/AsmVar,bioinformatics-centre/AsmVar,ShujiaHuang/AsmVar,bioinformatics-centre/AsmVar,bioinformatics-centre/AsmVar,bioinformatics-centre/AsmVar