Added support for File.read to return -1 preventing infinite loop #99
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File.read()has the potential to return -1. I experience this with cheaper SD Cards.In the case of returning -1,
File.read()will continue to return the same bytes but never advance the position in the file.This causes an infinite loop inside of
Adafruit_VS1053_FilePlayer::feedBuffer_noLockwhere the VS1053 is always ready for data because it's not receiving any.