Correct return type

Author: mchoo7

state.cpp

@@ -835,7 +835,7 @@ lutok::state::to_boolean(const int index) const
 /// \param index The second parameter to lua_tointeger.
 ///
 /// \return The return value of lua_tointeger.
-long
+int
 lutok::state::to_integer(const int index) const
 {
     assert(is_number(index));

state.hpp

@@ -124,7 +124,7 @@ class state {
     void set_metatable(int) const;
     void set_table(int);
     [[nodiscard]] bool to_boolean(int) const;
-    [[nodiscard]] long to_integer(int) const;
+    [[nodiscard]] int to_integer(int) const;
     template< typename Type > Type* to_userdata(int);
     [[nodiscard]] std::string to_string(int) const;
     static int upvalue_index(int);

state_test.cpp

@@ -802,7 +802,7 @@ ATF_TEST_CASE_BODY(push_cxx_function__fail_anything)
     lua_setglobal(raw(state), "cxx_divide");
 
     ATF_REQUIRE(luaL_dostring(raw(state), "return cxx_divide(-3, -1)") != 0);
-    ATF_REQUIRE_MATCH("Unhandled exception", lua_tostring(raw(state), -1));
+    ATF_REQUIRE_MATCH("Cannot divide negative numbers", lua_tostring(raw(state), -1));
     lua_pop(raw(state), 1);
 }