Music: initialize totalLength to have non-random data from the start
In the first `Music::Refresh` call the lastLength and totalLength are not initialized. The `lastLength` value is read first from the musicService. Naturally in the first itereation that is changed and `UpdateLength()` is called. There the variable `totalLength` is used as well, but that variable isn't initialed to a sensible value yet. This leads to sometimes the `Music.h` screen segfaulting (depending on the random uninitialized data in the `lastLength` variable)
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@ -69,7 +69,7 @@ namespace Pinetime {
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std::string track;
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/** Total length in seconds */
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int totalLength;
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int totalLength = 0;
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/** Current length in seconds */
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int currentLength;
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/** Last length */
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