A fix to mapping.lua
A fix to mapping.lua

- Set active_mapmode = sbox_mapmode if forced mapping mode
  name is "Default". This fixes things with the C mapping
  engine, and doesn't cause any harm with Lua either.

OlegGirko/ldbox,h113331pp/scratchbox2,ldbox/ldbox,h113331pp/scratchbox2,OlegGirko/ldbox,OlegGirko/ldbox,ldbox/ldbox,ldbox/ldbox,h113331pp/scratchbox2,ldbox/ldbox,ldbox/ldbox,OlegGirko/ldbox,OlegGirko/ldbox,h113331pp/scratchbox2,h113331pp/scratchbox2,h113331pp/scratchbox2,OlegGirko/ldbox,ldbox/ldbox