FIX: integer overflow on negative looping areas
FIX: integer overflow on negative looping areas

pariahsoft/Tsunagari,pariahsoft/TsunagariC,pmer/TsunagariC,pmer/TsunagariC,pariahsoft/Tsunagari,pariahsoft/Tsunagari,pariahsoft/TsunagariC,pmer/TsunagariC,pariahsoft/Tsunagari,pariahsoft/TsunagariC