• Delete ptr to fix -Wunused-but-set warnings
• Fix parse_ntp_ts to use saved_errno properly to also mute -Wunused-but-set warnings.
• Delete a few errant errno = 0 calls after calling strlcpy to let the error cases fail as designed if the strings passed in weren't base 10 numbers.
• Make style a bit consistent with all blocks where errno is saved to saved_errno.

Reported by: gcc 4.9.4