fix line chart renderer crash: can't form range when end < start #880
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ChartsDemo will crash all the time for the Line Chart1 Chart view controller,
This PR fix the line chart renderer crash:
can't form range when end < start
while phaseX is 0 (from + 1 ..< from + 0 is crashing); usestride
instead, seems stride can gracefully fail the loop@danielgindi I clicked the charts demo one by one, seems others are good, but I'm not sure if any of the rest for loops will have similar issue. Let's fix what we met first.