For not zero statistics, draw hyphen instead of 0 if no values different from zero are added
For not zero statistics, draw hyphen instead of 0 if no values different from zero are added

Co-authored-by: pantogon <b54d85a0e9429d4bf7c346bf0fac501f03c00911@users.noreply.github.com>
Co-authored-by: Miguel Moreno <e09eb4bf53f5e534b812c161387936dabba3edd7@users.noreply.github.com>

bsc-performance-tools/wxparaver,bsc-performance-tools/wxparaver