Fix -Wabsolute-value in TAP Compare stat (Found by Clang 3.5)
tap-comparestat.c:321:55: error: taking the absolute value of unsigned type 'unsigned int' has no effect [-Werror,-Wabsolute-value]
tap-comparestat.c:321:55: note: remove the call to 'abs' since unsigned values cannot be negative
tap-comparestat.c:347:56: error: taking the absolute value of unsigned type 'unsigned int' has no effect [-Werror,-Wabsolute-value]
tap-comparestat.c:347:56: note: remove the call to 'abs' since unsigned values cannot be negative
Change-Id: Ice950228d844373abcbd0cdc8ea05079b8b933d0
Reviewed-on: https://code.wireshark.org/review/676
Reviewed-by: Anders Broman <a.broman58@gmail.com>