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display: fix a bad overflow for empty lines due to clipping
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@ -42,6 +42,6 @@ void gint_dvline(int y1, int y2, int x, uint16_t color)
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uint16_t *v = gint_vram + 396 * y1 + x;
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int height = y2 - y1 + 1;
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while(height--) *v = color, v += 396;
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while(height-- > 0) *v = color, v += 396;
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}
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