PathView delegates are not created when model length = 67

steps to reproduce:

1) create model containing 67 items (or 61)

2) set preferredHighlightBegin = 0, preferredHighlightBegin =0

3) set highlightMoveDuration = 0

3) set pathItemCount = 7

4) use decrementCurrentIndex to scroll

Code based on pathview-example.qml from distrib is attached.

Draft analysis:

errors in operations with floating point numbers in positionOfIndex. Item's position must be >= 1 when item has left the path. But because of using qreal result of positionOfIndex is 0.9999...

So the condition in refill() "if (pos < 1)" failures which causes the bug.