fix compilation with GCC 5
fix compilation with GCC 5

johnd0e/FarManager,FarGroup/FarManager,FarGroup/FarManager,johnd0e/FarManager,FarGroup/FarManager,johnd0e/FarManager,johnd0e/FarManager,johnd0e/FarManager,FarGroup/FarManager,johnd0e/FarManager,FarGroup/FarManager,FarGroup/FarManager,johnd0e/FarManager,FarGroup/FarManager,johnd0e/FarManager,FarGroup/FarManager