Duplicate Fields have empty definitions with `InlineRefs` enabled

Describe the bug When using InlineRefs, multiple properties of the same type leave all but one fields without an inline definition.

To Reproduce When running the following code:

package jstest

import (
    "encoding/json"
    "testing"

    "github.com/swaggest/jsonschema-go"
)

type ExampleEvent struct {
    ID          string `json:"id,omitempty"`
    NewData     Data   `json:"new_data"`
    CurrentData Data   `json:"current_data"`
    OldData     Data   `json:"old_data"`
}

type Data struct {
    ID   string `json:"id,omitempty"`
    Name string `json:"name,omitempty"`
}

func TestRaw(t *testing.T) {
    ref := jsonschema.Reflector{}

    gen, _ := ref.Reflect(&ExampleEvent{}, func(rc *jsonschema.ReflectContext) {
        rc.InlineRefs = true
    })
    data, _ := json.MarshalIndent(gen, "", " ")
    t.Error(string(data))
}

The following schema is produced:

{
    "properties": {
        "current_data": {},
        "id": {
            "type": "string"
        },
        "new_data": {
            "properties": {
                "id": {
                    "type": "string"
                },
                "name": {
                    "type": "string"
                }
            },
            "type": "object"
        },
        "old_data": {}
    },
    "type": "object"
}

Expected behavior An inline definition should be produced for each of the 'current_data', 'new_data', old_data' fields

swaggest / jsonschema-go

Duplicate Fields have empty definitions with `InlineRefs` enabled #87