Last bin not used in marker drawings

Author: linev

changes.md

@@ -12,6 +12,7 @@
 8. Provide drawing of artificial "$legend" item - it creates TLegend for all primitives in pad
    Can be used when several histograms or several graphs superimposed.
 9. Let configure "&toolbar=vert" in URL to change orientation of tool buttons
+10. Improve markers and error bars drawing for TH1/TProfile
 
 
 ## Changes in 5.4.0

scripts/JSRootPainter.hist.js

@@ -3840,7 +3840,7 @@
       // check if we should draw markers or error marks directly, skipping optimization
       if (do_marker || do_err)
          if (!JSROOT.gStyle.OptimizeDraw || ((right-left<50000) && (JSROOT.gStyle.OptimizeDraw==1))) {
-            for (i = left; i <= right; ++i) {
+            for (i = left; i < right; ++i) {
                if (extract_bin(i)) {
                   if (path_marker !== null)
                      path_marker += pthis.markeratt.create(midx, my);