preallocating space in tables from Lua

[David Manura <dm.lua@...>]

As previously discussed [1,2], Lua code does not have a direct manner
of preallocating space in tables, like in the lua_createtable [3] C
API function.  The problem and its solutions, including a new solution
involving Lua bytecode hacking, are now described in

  http://lua-users.org/wiki/TablePreallocation

[1] http://lua-users.org/lists/lua-l/2009-06/msg00438.html
[2] http://lua-users.org/lists/lua-l/2009-04/msg00425.html
[3] http://www.lua.org/manual/5.1/manual.html#lua_createtable