Function checkint

Source/Misc/lua/src/lua.c:10492–10496

#if defined(LUA_COMPAT_GETN)

static int checkint (lua_State *L, int topop) {
int n = (lua_type(L, -1) == LUA_TNUMBER) ? lua_tointeger(L, -1) : -1;
lua_pop(L, topop);
return n;
}


static void getsizes (lua_State *L) {