In the movie HP7 Part 1, Voldemort takes Lucius' wand in the dining room scene at the beginning of the movie. He then breaks it and asks about the core.

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> Voldemort: Do I detect Elm? 
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> Lucius: Yes, my lord 
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> Voldemort: (breaks wand) And, the core...
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If he intended to use it, why would he break it? From The Chamber of Secrets, we know that a wand that's been broken is never the same. Only with the Elder wand was Harry able to repair his. Surely Voldemort knows a broken wand is useless. Why would he have broken it, and how did he fix it? 

I realize there is a difference between the books and the movies, and that this never happened in the books, so I know the books are useless to answer this, and the movies don't. So that leaves us with JKR quotes. Was this ever addressed?