fix warnning

Author: fesily

script/plugins/ffi/c-parser/cpp.lua

@@ -1,3 +1,4 @@
+---@diagnostic disable: undefined-global, assign-type-mismatch
 
 local cpp = {}
 
@@ -26,7 +27,7 @@ else
     ]])()
 end
 
-local function debug() end
+local function debug(...) end
 --[[
 local inspect = require("inspect")
 local function debug(...)

script/plugins/ffi/c-parser/ctypes.lua

@@ -107,6 +107,7 @@ local convert_value = typed("TypeList, table -> CType?, string?", function (lst,
         src.ids = util.expandSingle(src.ids)
         -- FIXME multiple ids, e.g.: int *x, y, *z;
         local ok
+---@diagnostic disable-next-line: cast-local-type
         ok, name, ret_pointer, idxs = get_name(src.id or src.ids)
         if not ok then
             return nil, name

script/plugins/ffi/searchCode.lua

@@ -3,6 +3,9 @@ local vm = require 'vm'
 local function getLiterals(arg)
     local literals = vm.getLiterals(arg)
     local res = {}
+    if not literals then
+        return res
+    end
     for k, v in pairs(literals) do
         if type(k) == 'string' then
             res[#res+1] = k