libmythui: allow horizlistbuttonlist to inherit a buttonlist xml definition. causes a crash for me.

[skamithi]

If I define the following:

<buttonlist name="commonelements">
      <margin>10</margin>
</buttonlist>


<horizontalbuttonlist name="ok_cancel_buttons" from="commonelements">
  <area>50,500,500,100</area>
  <items>2</items>
</horizontalbuttonlist>

..it crashes. if I specify commonelement tag as a horiztontalbuttonlist, it works.

patch attach to resolve this for me.

[stuartm]

Just so you know what I intend to do with this issue, I want to combine the horizontal button list with the vertical one which solves the issue of inheritance and gives us a more flexible widget. I also plan a grid layout.

e.g.

<buttonlist name="commonelements">

<margin>10</margin>

</buttonlist>

<buttonlist name="ok_cancel_buttons" from="commonelements">

<area>50,500,500,100</area> <items>2</items> <orientation>horizontal</orientation>

</buttonlist>

This would give us huge flexibility when theming. The buttonlist widget could then be used to replace the listarea widget, the main menus, the popup menus, the mythvideo/mythgallery gallery widget and with some imagination and transition effect it would permit apple style albumart browsing.

[stuartm]

Fixed by [15721]