avoid NPE when invoking Bnd's error method

git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@939080 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/dependencymanager/annotation/src/main/java/org/apache/felix/dm/annotation/plugin/bnd/DescriptorGenerator.java b/dependencymanager/annotation/src/main/java/org/apache/felix/dm/annotation/plugin/bnd/DescriptorGenerator.java
index 055eb41..1b9f926 100644
--- a/dependencymanager/annotation/src/main/java/org/apache/felix/dm/annotation/plugin/bnd/DescriptorGenerator.java
+++ b/dependencymanager/annotation/src/main/java/org/apache/felix/dm/annotation/plugin/bnd/DescriptorGenerator.java
@@ -120,7 +120,7 @@
             }
             sb.append(": ");
             sb.append(parse(err));
-            error(sb.toString(), err.getCause());
+            error(sb.toString());
             return false;
         }