Fix typo

Author: linev

modules/gpad/TPadPainter.mjs

@@ -1204,8 +1204,8 @@ class TPadPainter extends ObjectPainter {
          menu.add('Save to gStyle', () => {
             if (!this.pad) return;
             this.fillatt?.saveToStyle(this.iscan ? 'fCanvasColor' : 'fPadColor');
-            gStyle.fPadGridX = this.pad.fGridX;
-            gStyle.fPadGridY = this.pad.fGridX;
+            gStyle.fPadGridX = this.pad.fGridx;
+            gStyle.fPadGridY = this.pad.fGridy;
             gStyle.fPadTickX = this.pad.fTickx;
             gStyle.fPadTickY = this.pad.fTicky;
             gStyle.fOptLogx = this.pad.fLogx;