fix Libre A2
fix #131 - with 4.2 a check was added on slope parameters. This was taken over from bubbledevteam pull request. Apparently this causes Libre 1 A2 failure.
fix #131 - with 4.2 a check was added on slope parameters. This was taken over from bubbledevteam pull request. Apparently this causes Libre 1 A2 failure.