Fix - typo in assigning axis range from pad

Appeared only when pad.fLogy was set

Author: linev

scripts/JSRootPainter.hist.js

@@ -3009,7 +3009,7 @@
 
       this.scale_xmin = this.xmin;
       this.scale_xmax = this.xmax;
-      if (use_pad_range) {
+      if (use_pad_range && pad) {
          var dx = pad.fX2 - pad.fX1;
          this.scale_xmin = pad.fX1 + dx*pad.fLeftMargin;
          this.scale_xmax = pad.fX2 - dx*pad.fRightMargin;
@@ -3062,13 +3062,13 @@
       this.scale_ymin = use_pad_range ? pad.fUymin : this.ymin;
       this.scale_ymax = use_pad_range ? pad.fUymax : this.ymax;
 
-      if (use_pad_range) {
+      if (use_pad_range && pad) {
          var dy = pad.fY2 - pad.fY1;
          this.scale_ymin = pad.fY1 + dy*pad.fBottomMargin;
          this.scale_ymax = pad.fY2 - dy*pad.fTopMargin;
-         if (pad.fLogx) {
-            this.scale_xmin = Math.pow(10, this.scale_xmin);
-            this.scale_xmax = Math.pow(10, this.scale_xmax);
+         if (pad.fLogy) {
+            this.scale_ymin = Math.pow(10, this.scale_ymin);
+            this.scale_ymax = Math.pow(10, this.scale_ymax);
          }
       }
       if (this.zoom_ymin != this.zoom_ymax) {