poly2d/p2d_attrib.c (p2d_is_cw): check that the angle isn't NaN
Been had by this a little too often ...
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@ -72,6 +72,7 @@ bool p2d_is_cw(const struct p2d *p)
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v = v->next;
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}
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while (v != p->v);
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assert(!isnan(a)); /* require -std=c99 or -std=gnu99 */
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return a < 0;
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}
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