tc: Use correct variable type for get_distribution() result

get_distribution() returns an int.

cppcheck reported:
[tc/q_netem.c:243]: (style) Checking if unsigned variable 'dist_size' is less than zero.

The mismatch actually rendered the error checking
after get_distribution() ineffective.

Signed-off-by: Thomas Jarosch <thomas.jarosch@intra2net.com>
1 file changed