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fixed a crash when drawing aura in some projections
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@ -3058,7 +3058,7 @@ EX void addaura(shiftpoint h, color_t col, int fd) {
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if(!haveaura_cached) return;
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apply_joukowsky_aura(h);
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int r = int(2*AURA + atan2(h[1], h[0]) * AURA / 2 / M_PI) % AURA;
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int r = gmod(atan2(h[1], h[0]) * AURA / 2 / M_PI, AURA);
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aurac[r][3] += auramemo << fd;
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col = darkened(col);
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aurac[r][0] += (col>>16)&255;
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