[gl canvas] fix implicit boolean conversion error on some drivers
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@ -340,7 +340,7 @@ int quadratic_roots_with_det(float a, float b, float c, float det, out float r[2
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if(a == 0)
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{
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if(b)
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if(b != 0)
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{
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count = 1;
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r[0] = -c/b;
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@ -773,7 +773,7 @@ void cubic_setup(vec2 p[4], int pathIndex)
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int rootCount = rootCountX + rootCountY;
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for(int i=0; i<2; i++)
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{
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if(curve.ts[i].y)
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if(curve.ts[i].y != 0)
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{
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roots[rootCount] = curve.ts[i].x / curve.ts[i].y;
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rootCount++;
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