* fix: avoid potential resource leak in metainfo test Xref: https://scan5.coverity.com/reports.htm#v48014/p10174/fileInstanceId=205022335&defectInstanceId=52337396&mergedDefectId=1494638 * fix: use-init-statement warning Xref: https://sonarcloud.io/project/issues?id=transmission_transmission&issues=AX2MsJ_lWODkx6cuASq6&open=AX2MsJ_lWODkx6cuASq6 * fix: omit-redundant-override-specifier warning Xref: https://sonarcloud.io/project/issues?id=transmission_transmission&issues=AX2MsJ5GWODkx6cuASq5&open=AX2MsJ5GWODkx6cuASq5 * fix: improper-use-of-negative-value warning Xref: https://scan5.coverity.com/reports.htm#v48014/p10174/fileInstanceId=205020121&defectInstanceId=52337394&mergedDefectId=1494639 * fix: unchecked return value warning Xref: https://scan5.coverity.com/reports.htm#v48014/p10174/fileInstanceId=205020168&defectInstanceId=52304887&mergedDefectId=1491438 * fix: potential-divide-by-zero warning Xref: https://scan5.coverity.com/reports.htm#v48014/p10174/fileInstanceId=205020106&defectInstanceId=52337395&mergedDefectId=1494438