fix(compiling): map variable without namespace. (#1395)
fix(compiling): map variable without namespace. (#1395)

If polybar is compiled with `-xkb +xcursor`, `cursor.hpp` doesn't include `using std::map`, which is located in `xkb.hpp`
jaagr/polybar,jaagr/polybar,jaagr/polybar,jaagr/lemonbuddy,jaagr/lemonbuddy,jaagr/lemonbuddy