Access composer items in Python causes segfault

[NathanW]

If you try and access composer items that were created using the tools in the composer window, eg new label, scale etc QGIS crashes with a seg fault.

To reproduce:

Open composer and create label, select label, open python window and type:

comp = qgis.utils.iface.activeComposers()[0}.composition()
label = comp.selectedComposerItems()[0]
label.displayText() // or any other method

If the label is created using python then the above works as expected, otherwise QGIS gives a segfault.

This happens if you try and access any type of composer item in python using the above method.

[wonder]

Fixed in r14766