Fix - do not set histogram min/max for scatter plot

Author: linev

modules/hist2d/TGraphPainter.mjs

@@ -349,8 +349,10 @@ class TGraphPainter extends ObjectPainter {
       if (set_y && !histo.fYaxis.fLabels) {
          histo.fYaxis.fXmin = Math.min(minimum0, minimum);
          histo.fYaxis.fXmax = Math.max(maximum0, maximum);
-         histo.fMinimum = minimum;
-         histo.fMaximum = maximum;
+         if (!this._need_2dhist) {
+            histo.fMinimum = minimum;
+            histo.fMaximum = maximum;
+         }
       }
 
       return histo;