Division by 0 in UpdateTransformCache

[Lectem]

In the case where the minimum for an axis is 0, it causes a division by 0 here (and for Y axes):

implot/implot.cpp

Line 514 in 555ff68

gp.LogDenX = ImLog10(gp.CurrentPlot->XAxis.Range.Max / gp.CurrentPlot->XAxis.Range.Min);

This can be an issue when float exceptions are enabled.
I fixed this by arbitrarily setting LogDenX to 0 if the min value is 0, however I am unsure if you would want to fix it another way.
Note that it also causes issues if the Max/Min value is negative.

[epezent]

This shouldn't matter since we always constrain the min value to be above 0 when log scale is enabled before UpdateTransformCache is ever called. However, we always calculate LogDen even if log scale is not enable, which is why you are seeing the exception. I've added a conditional that will skip the calculation of log scale is not enabled:

e9469cf

[Lectem]

It's less about the fact it could be incorrect and more about having to wrap code with disabled float exceptions :)

Thanks!