wavtoraw: Fix warning about round not being defined
wavtoraw: Fix warning about round not being defined

clbr/SGDK,Stephane-D/SGDK,andwn/SGDK,clbr/SGDK,clbr/SGDK,andwn/SGDK,andwn/SGDK,clbr/SGDK,Stephane-D/SGDK,Stephane-D/SGDK