fix MSVC warnings

luakiwi.def

@@ -0,0 +1,2 @@
+EXPORTS
+luaopen_ckiwi

luakiwi/luakiwi-int.h

@@ -120,36 +120,36 @@ template<typename F>
 inline const KiwiErr* wrap_err(F&& f) {
    try {
       f();
-   } catch (const UnsatisfiableConstraint& ex) {
+   } catch (const UnsatisfiableConstraint&) {
       static const constexpr KiwiErr err {
           KiwiErrUnsatisfiableConstraint,
           "The constraint cannot be satisfied."};
       return &err;
-   } catch (const UnknownConstraint& ex) {
+   } catch (const UnknownConstraint&) {
       static const constexpr KiwiErr err {
           KiwiErrUnknownConstraint,
           "The constraint has not been added to the solver."};
       return &err;
 
-   } catch (const DuplicateConstraint& ex) {
+   } catch (const DuplicateConstraint&) {
       static const constexpr KiwiErr err {
           KiwiErrDuplicateConstraint,
           "The constraint has already been added to the solver."};
       return &err;
 
-   } catch (const UnknownEditVariable& ex) {
+   } catch (const UnknownEditVariable&) {
       static const constexpr KiwiErr err {
           KiwiErrUnknownEditVariable,
           "The edit variable has not been added to the solver."};
       return &err;
 
-   } catch (const DuplicateEditVariable& ex) {
+   } catch (const DuplicateEditVariable&) {
       static const constexpr KiwiErr err {
           KiwiErrDuplicateEditVariable,
           "The edit variable has already been added to the solver."};
       return &err;
 
-   } catch (const BadRequiredStrength& ex) {
+   } catch (const BadRequiredStrength&) {
       static const constexpr KiwiErr err {
           KiwiErrBadRequiredStrength,
           "A required strength cannot be used in this context."};

luakiwi/luakiwi.cpp

@@ -1340,7 +1340,7 @@ static int lkiwi_add_remove_tab(lua_State* L, add_remove_fn_t fn, void* d) {
    return 1;
 }
 
-static const KiwiErr* add_constraint_fn(lua_State* L, KiwiSolver* s, void* d) {
+static const KiwiErr* add_constraint_fn(lua_State* L, KiwiSolver* s, void*) {
    return kiwi_solver_add_constraint(s->solver, *get_constraint(L, -1));
 }
 
@@ -1348,7 +1348,7 @@ static int lkiwi_solver_add_constraints(lua_State* L) {
    return lkiwi_add_remove_tab(L, add_constraint_fn, 0);
 }
 
-static const KiwiErr* remove_constraint_fn(lua_State* L, KiwiSolver* s, void* d) {
+static const KiwiErr* remove_constraint_fn(lua_State* L, KiwiSolver* s, void*) {
    return kiwi_solver_remove_constraint(s->solver, *get_constraint(L, -1));
 }
 
@@ -1365,7 +1365,7 @@ static int lkiwi_solver_add_edit_vars(lua_State* L) {
    return lkiwi_add_remove_tab(L, add_edit_var_fn, &strength);
 }
 
-static const KiwiErr* remove_edit_var_fn(lua_State* L, KiwiSolver* s, void* d) {
+static const KiwiErr* remove_edit_var_fn(lua_State* L, KiwiSolver* s, void*) {
    return kiwi_solver_remove_edit_var(s->solver, *get_var(L, -1));
 }
 
@@ -1610,7 +1610,7 @@ static void compat_init(lua_State* L, int context_absi) {
    lua_rawseti(L, context_absi, VAR_SUB_FN);
 }
 #else
-static void compat_init(lua_State* L, int i) {}
+static void compat_init(lua_State*, int) {}
 #endif /* Lua 5.1 */
 
 #ifdef __cplusplus