javaee-jsp-api/issues53 NullPointerException is thrown if tld file doesn't include <validator> tag.

Author: ruolli

impl/src/main/java/org/apache/jasper/compiler/TagLibraryInfoImpl.java

@@ -126,7 +126,7 @@ public String toString() {
         print("urn", urn, out);
         print("info", info, out);
         print("uri", uri, out);
-        print("tagLibraryValidator", tagLibraryValidator.toString(), out);
+        print("tagLibraryValidator", "" + tagLibraryValidator, out);
 
         for(int i = 0; i < tags.length; i++)
             out.println(tags[i].toString());