"select" event can return a null item even when the nullableSelect property is set to false

[tbl0605]

Hi, Sometimes the "select" event doesn't return a non-null element when used this way:

<vue-simple-suggest
   @select="setValueFromSuggestion"
   ...

To reproduce the problem with a vue-simple-suggest component:

1. write something in the input field
2. hover the suggestions with the mouse (but don't select a suggestion)
3. press enter (the focus must still be in the input field)
4. the setValueFromSuggestion function will retrieve an null/undefined item

Fortunately, the fix is quite simple.

Thierry.