data bounds of evans() and sgrid() are wrong
Reported by Samuel GOUGEON (@sgougeon)
BUG DESCRIPTION:
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sgrid() examples
* Scilab 5.5.0: https://help.scilab.org/docs/5.5.0/en_US/sgrid.html : OK
* Scilab 5.5.1: https://help.scilab.org/docs/5.5.1/en_US/sgrid.html => already broken
* Scilab 6.0.0: https://help.scilab.org/docs/6.0.0/en_US/sgrid.html => = 5.5.1 = 5.5.2
* Scilab 6.0.1: https://help.scilab.org/docs/6.0.1/en_US/sgrid.html => exploded!
This kills all evans() rendering: https://help.scilab.org/docs/6.0.1/en_US/evans.html
ERROR LOG:
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HOW TO REPRODUCE THE BUG:
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run the sgrid() and evans() help examples
OTHER INFORMATION:
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Bug found while testing the bug 15213