Reactivate debug subsystem because PICO-8 uses debug.traceback().

Author: samhocevar

linit.c

@@ -32,6 +32,7 @@ static const luaL_Reg loadedlibs[] = {
   {LUA_COLIBNAME, luaopen_coroutine},
   {LUA_TABLIBNAME, luaopen_table},
   {LUA_STRLIBNAME, luaopen_string},
+  {LUA_DBLIBNAME, luaopen_debug},
   {NULL, NULL}
 };
 

ltests.c

@@ -879,6 +879,7 @@ static int loadlib (lua_State *L) {
     {"_G", luaopen_pico8},
     {"coroutine", luaopen_coroutine},
     {"string", luaopen_string},
+    {"debug", luaopen_debug},
     {"table", luaopen_table},
     {NULL, NULL}
   };

makefile

@@ -44,7 +44,7 @@ CORE_O=	lapi.o lcode.o ldebug.o ldo.o ldump.o lfunc.o lgc.o llex.o lmem.o \
 	lobject.o lopcodes.o lparser.o lstate.o lstring.o ltable.o ltm.o  \
 	lundump.o lvm.o lzio.o lctype.o
 AUX_O=	lauxlib.o
-LIB_O=	lbaselib.o lcorolib.o ltablib.o lstrlib.o lpico8lib.o linit.o
+LIB_O=	lbaselib.o lcorolib.o ldblib.o ltablib.o lstrlib.o lpico8lib.o linit.o
 
 LUA_T=	z8lua
 LUA_O=	lua.o