makeDetailsMask optimization (j12)

Meter.c

@@ -527,7 +527,7 @@ static uint16_t GraphMeterMode_makeDetailsMask(const GraphColorComputeState* pre
       // In case of a tie, display the dot at lower position of the graph,
       // i.e. MSB of the "details" data.
       double fraction = maxBlanks - (int)maxBlanks;
-      double distance = maxBlanks + ((double)(int)prev->nCellsPainted - prevTopPoint) * 8.0 + (1.0 - fraction) * 0.5;
+      double distance = maxBlanks + ((double)(int)prev->nCellsPainted - prevTopPoint) * 8.0 + (0.5 - fraction * 0.5);
       if (distance <= 0.0)
          distance = 0.0;