Fix/whitelist some clippy warnings

Author: khvzak

src/multi.rs

@@ -34,7 +34,7 @@ impl<'lua, T: ToLua<'lua>> ToLuaMulti<'lua> for T {
 
 impl<'lua, T: FromLua<'lua>> FromLuaMulti<'lua> for T {
     fn from_lua_multi(mut values: MultiValue<'lua>, lua: &'lua Lua) -> Result<Self> {
-        Ok(T::from_lua(values.pop_front().unwrap_or(Nil), lua)?)
+        T::from_lua(values.pop_front().unwrap_or(Nil), lua)
     }
 }
 

src/serde/de.rs

@@ -20,7 +20,9 @@ impl<'lua, 'de> serde::Deserializer<'de> for Deserializer<'lua> {
         match self.0 {
             Value::Nil => visitor.visit_unit(),
             Value::Boolean(b) => visitor.visit_bool(b),
+            #[allow(clippy::useless_conversion)]
             Value::Integer(i) => visitor.visit_i64(i.into()),
+            #[allow(clippy::useless_conversion)]
             Value::Number(n) => visitor.visit_f64(n.into()),
             Value::String(s) => match s.to_str() {
                 Ok(s) => visitor.visit_str(s),

src/value.rs

@@ -125,7 +125,9 @@ impl<'lua> Serialize for Value<'lua> {
         match self {
             Value::Nil => serializer.serialize_unit(),
             Value::Boolean(b) => serializer.serialize_bool(*b),
+            #[allow(clippy::useless_conversion)]
             Value::Integer(i) => serializer.serialize_i64((*i).into()),
+            #[allow(clippy::useless_conversion)]
             Value::Number(n) => serializer.serialize_f64((*n).into()),
             Value::String(s) => s.serialize(serializer),
             Value::Table(t) => t.serialize(serializer),