Events with modifiers always return "undefined"

[STUkh]

Version

2.5.13

Reproduction link

https://jsfiddle.net/ybr5s354/15/

Steps to reproduce

1. Create event with any modifier
2. Create directive and get event instance from vnode.
3. Call event (maybe dummy event will required)

What is expected?

Event with and without modifiers return function value

What is actually happening?

Only event without modifier return value.
Events with modifiers always return undefined

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Fixed in this PR: #7704

[yyx990803]

Closed via #7704