Coverity NO_EFFECT - CID 10486

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CID: 10486
Checker: NO_EFFECT
Category: unsigned_compare_macros
CWE definition: http://cwe.mitre.org/data/definitions/398.html
File: /tmp/buildd/notify-osd-0.9.33/egg/egg-alpha.c
Function: egg_exp_dec_func()
Code snippet:
1015 n_frames = egg_timeline_get_n_frames (timeline);
1016
1017 x = (x_alpha_max * (n_frames - frame)) / n_frames;
1018
CID 10486 - NO_EFFECT
This less-than-zero comparison of an unsigned value is never true. "egg_pow2x(x) - 1U < 0U".
1019 result = CLAMP (egg_pow2x (x) - 1, 0, EGG_ALPHA_MAX_ALPHA);
1020
1021 return result;
1022 }