places example app crash

Using the places example: qml_location_places

Steps to reproduce:
1) Switch to using the jsondb plugin
2) Add two new places
3) perform a search with an empty search term to retrieve all places
4) Observe that the program crashes due to memory corruption with a message similar to the following: *** glibc detected *** ./qml_location_places: malloc(): memory corruption (fast): 0x09d20510 ***