zooming infinitely causes infinite allocating loop

89              const qreal deltaX = gridRect.width() / (maxValue - minValue);
90
91              QList<qreal> points;
92              const qreal leftPos = gridRect.left();
93              while (value <= maxValue || qFuzzyCompare(value, maxValue)) {
94                  points << (value - minValue) * deltaX + leftPos;
95                  value += interval;
96              }
97
98              return points;