fix getClassLocation method in Diagnostics class. Bug 48782. Reported by Torsten Werner. Patch by Ludovic Claude.

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@912258 13f79535-47bb-0310-9956-ffa450edef68

WHATSNEW

@@ -29,6 +29,9 @@ Fixed bugs:
 
  * VectorSet#remove(Object) would fail if the size of the vector
    equaled its capacity.
+   
+ * Regression : ant -diagnostics was returning with exit code 1
+   Bugzilla Report 48782  
 
 Other changes:
 --------------

src/main/org/apache/tools/ant/Diagnostics.java

@@ -180,6 +180,9 @@ public final class Diagnostics {
      * @since Ant 1.8.0
      */
     private static URL getClassLocation(Class clazz) {
+		if (clazz.getProtectionDomain().getCodeSource() == null) {
+			return null;
+		}
         return clazz.getProtectionDomain().getCodeSource().getLocation();
     }