Fix M_PI declaration on VisualC++
Fix M_PI declaration on VisualC++

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