Lua :
Lua :

This patch changes LuaNil PMC, it used to be a singleton, this patch makes it a normal PMC.
some other methods are implemented for morphing into other Lua types (LuaString, LuaNumber, LuaBoolean).

Courtesy of Klaas-Jan Stol.

+ change Parrot_PMC_typenum by pmc_type

fperrad/lua,fperrad/lua