Allow for failure with Visual Studio 2012.
Allow for failure with Visual Studio 2012.

std::log2 is available only since 2013.
synkarae/Quasar,sav6622/aquila,zsiciarz/aquila,zsiciarz/aquila,synkarae/aquila,synkarae/Quasar,sav6622/aquila,zsiciarz/aquila,tempbottle/aquila,Aldor007/aquila,zsiciarz/aquila,sav6622/aquila,tempbottle/aquila,Aldor007/aquila,synkarae/Quasar,synkarae/aquila,Aldor007/aquila,tempbottle/aquila,synkarae/aquila