Remove field param from cellStyle.

src/bootstrap-table.js

@@ -506,16 +506,18 @@
                 }
                 
                 if ($.isNumeric(aa) && $.isNumeric(bb)) {
-                    if (aa < bb)
+                    if (aa < bb) {
                         return order * -1;
+                    }
                     return order;
                 }
                 
                 if (aa === bb) {
                     return 0;
                 }
-                if (aa.localeCompare(bb) == -1)
+                if (aa.localeCompare(bb) == -1) {
                     return order * -1;
+                }
                     
                 return order;
             });
@@ -1003,7 +1005,7 @@
                 }
 
                 cellStyle = calculateObjectValue(that.header,
-                    that.header.cellStyles[j], [value, field,item, i], cellStyle);
+                    that.header.cellStyles[j], [value, item, i], cellStyle);
                 if (cellStyle.classes) {
                     class_ = sprintf(' class="%s"', cellStyle.classes);
                 }