Updated check for MINGW compile
Updated check for MINGW compile

Needed to work on both mingw32 and mingw64.

MageSlayer/sox,MageSlayer/sox,Motiejus/sox,MageSlayer/sox,Motiejus/sox,cbagwell/sox,cbagwell/sox,MageSlayer/sox,uklauer/sox,pcqpcq/sox,MageSlayer/sox,Motiejus/sox,pcqpcq/sox,uklauer/sox,pcqpcq/sox,mhartzel/sox_personal_fork,CaptainHayashi/sox,cbagwell/sox,CaptainHayashi/sox,mhartzel/sox_personal_fork,CaptainHayashi/sox,mhartzel/sox_personal_fork,pcqpcq/sox,CaptainHayashi/sox,uklauer/sox,mhartzel/sox_personal_fork,Motiejus/sox,uklauer/sox,cbagwell/sox