Function steamworks_sys::SteamAPI_ISteamUGC_UpdateItemPreviewFile

pub unsafe extern "C" fn SteamAPI_ISteamUGC_UpdateItemPreviewFile(
    self_: *mut ISteamUGC, 
    handle: UGCUpdateHandle_t, 
    index: uint32, 
    pszPreviewFile: *const c_char
) -> bool