[401558] "Remove Language from Project" throws an Exception

org.eclipse.babel.tapiji.tools.core.ui/src/org/eclipse/babel/tapiji/tools/core/ui/ResourceBundleManager.java

diff --git a/org.eclipse.babel.tapiji.tools.core.ui/src/org/eclipse/babel/tapiji/tools/core/ui/ResourceBundleManager.java b/org.eclipse.babel.tapiji.tools.core.ui/src/org/eclipse/babel/tapiji/tools/core/ui/ResourceBundleManager.java
index 644b4a0..f06a4f7 100644
--- a/org.eclipse.babel.tapiji.tools.core.ui/src/org/eclipse/babel/tapiji/tools/core/ui/ResourceBundleManager.java
+++ b/org.eclipse.babel.tapiji.tools.core.ui/src/org/eclipse/babel/tapiji/tools/core/ui/ResourceBundleManager.java
@@ -790,8 +790,9 @@
             if (!rb_l.isEmpty()) {
                 Object[] bundlelocales = rb_l.toArray();
                 for (Object l : bundlelocales) {
-                    /* TODO check if useful to add the default */
-                    if (!locales.contains(l)) {
+                    /* TODO check if useful to add the default. For now the default is not
+                     * being used and is ignored as it is null */
+                    if (l != null && !locales.contains(l)) {
                         locales.add((Locale) l);
                     }
                 }