pllua - pllua: Bug fix on luaP_totuple, added _PLVERSION

Log Message:
-----------
Bug fix on luaP_totuple, added _PLVERSION

Modified Files:
--------------
pllua:
pllua.h (r1.15 -> r1.16)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pllua/pllua/pllua.h.diff?r1=1.15&r2=1.16)
plluaapi.c (r1.17 -> r1.18)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pllua/pllua/plluaapi.c.diff?r1=1.17&r2=1.18)
plluaspi.c (r1.18 -> r1.19)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pllua/pllua/plluaspi.c.diff?r1=1.18&r2=1.19)