Fix - errors calculations for TProfile

Author: linev

scripts/JSRootCore.js

@@ -1758,12 +1758,12 @@
          m.getBinEffectiveEntries = function(bin) {
             if (bin < 0 || bin >= this.fNcells) return 0;
             var sumOfWeights = this.fBinEntries[bin];
-            if ( this.fBinSumw2 == null || this.fBinSumw2.length != this.fNcells) {
+            if ( !this.fBinSumw2 || this.fBinSumw2.length != this.fNcells) {
                // this can happen  when reading an old file
                return sumOfWeights;
             }
-            var sumOfWeightsSquare = this.fSumw2[bin];
-            return ( sumOfWeightsSquare > 0 ? sumOfWeights * sumOfWeights / sumOfWeightsSquare : 0 );
+            var sumOfWeightsSquare = this.fBinSumw2[bin];
+            return (sumOfWeightsSquare > 0) ? sumOfWeights * sumOfWeights / sumOfWeightsSquare : 0;
          };
          m.getBinError = function(bin) {
             if (bin < 0 || bin >= this.fNcells) return 0;