forgot that regexp.match returns null when it doesn't find anything

version.rkt

@@ -7,4 +7,4 @@
 (provide version)
 (: version String)
 
-(define version "1.90")
+(define version "1.93")

web-world/js-impl.js

@@ -656,9 +656,11 @@
 	// to avoid any 'Permission Denied' errors in IE
         div.innerHTML = str.replace(rscript, "").replace(rlink, "");
         var linkMatches = str.match(rlink);
+        if (linkMatches) {
             for (var i = 0; i < linkMatches.length; i++) {
                 $(div).append($(linkMatches[i]));
             }
+        }
         return $(div);
     };