#36 Crash if y_min == y_max

[eL]

Like #1773502 also in V2 Beta 1

Sample Data:
{"elements":[{"type":"line_dot","values":[50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50],"halo-size":1,"width":2,"dot-size":2}],"title":{"text":"Text"},"y_axis":{"min":50,"max":50,"steps":0},"x_axis":{}}

[François-Xavier MAURICARD]

Same issue for the X axis.