lmsensors: Fix buffer size passed to snprintf
Pass the actual size of the buffer to snprintf, otherwise the program aborts if built with _FORTIFY_SOURCE=3.
Downstream report: https://bugzilla.opensuse.org/show_bug.cgi?id=1200656
Pass the actual size of the buffer to snprintf, otherwise the program aborts if built with _FORTIFY_SOURCE=3.
Downstream report: https://bugzilla.opensuse.org/show_bug.cgi?id=1200656