Timestamp of RecentlyPlayed change during rollover

[simoncn]

This might be caused by multiple reads of the same file by the renderer in a short space of time. For example, some renderers read the file and then immediately close it and read it again. In this case, MinimServer writes the time of the first read when it happens and also stores this time in memory. When the second read happens, MinimServer updates the last played time in memory but does not write a second entry to the played-files.txt file.

If something then happens to cause MinimServer to completely rewrite the played-files.txt file, the time of the second read will be written. As the purpose of this file is to enable recently played files to be sorted in the order of playing, a small difference in the timestamps doesn't matter.