Update ui-grid-column-resizer.js

Author: Jameel99

packages/resize-columns/src/js/ui-grid-column-resizer.js

@@ -119,6 +119,9 @@
           if (position === 'left') {
             // Get the column to the left of this one
             var colIndex = renderContainer.visibleColumnCache.indexOf(col);
+            if(colIndex === 0){
+              return renderContainer.visibleColumnCache[0];
+            }
             return renderContainer.visibleColumnCache[colIndex - 1 * rtlMultiplier];
           } else {
             return col;