Minor fix

git-svn-id: http://svn.igniterealtime.org/svn/repos/messenger/trunk@1106 b35dd754-fafc-0310-a699-88a17e54d16e

src/tools/anttask/org/jivesoftware/ant/SubDirInfoTask.java

@@ -84,6 +84,7 @@ public class SubDirInfoTask extends Task {
         StringBuffer buf = new StringBuffer();
         String value = null;
         String sep = "";
+        if (subdirs != null) {
             for (int i=0; i<subdirs.length; i++) {
                 File subdir = subdirs[i];
                 boolean add = false;
@@ -103,6 +104,7 @@ public class SubDirInfoTask extends Task {
                     sep = getDelimiter();
                 }
             }
+        }
         if (buf.length() > 0) {
             value = buf.toString();
         }