Declare variables

Signed-off-by: Michal Čihař <michal@cihar.com>

weblate/media/loader-bootstrap.js

@@ -22,7 +22,7 @@ jQuery.fn.extend({
             if (document.selection) {
                 // For browsers like Internet Explorer
                 this.focus();
-                sel = document.selection.createRange();
+                var sel = document.selection.createRange();
                 sel.text = myValue;
                 this.focus();
             } else if (this.selectionStart || this.selectionStart == '0') {