Fix locked workspace in Home.

A dialog can be dismissed without being cancelled. This change simply
adds a dismiss listener to the Add dialog in Home to make sure the
workspace is properly unlocked when the dialog is dismissed.

src/com/android/launcher/Launcher.java

@@ -1744,7 +1744,7 @@ public final class Launcher extends Activity implements View.OnClickListener, On
      * appropriate activity.
      */
     private class CreateShortcut implements DialogInterface.OnClickListener,
-            DialogInterface.OnCancelListener {
+            DialogInterface.OnCancelListener, DialogInterface.OnDismissListener {
         private AddAdapter mAdapter;
 
         Dialog createDialog() {
@@ -1760,6 +1760,7 @@ public final class Launcher extends Activity implements View.OnClickListener, On
 
             AlertDialog dialog = builder.create();
             dialog.setOnCancelListener(this);
+            dialog.setOnDismissListener(this);
 
             return dialog;
         }
@@ -1769,6 +1770,10 @@ public final class Launcher extends Activity implements View.OnClickListener, On
             cleanup();
         }
 
+        public void onDismiss(DialogInterface dialog) {
+            mWorkspace.unlock();
+        }
+
         private void cleanup() {
             mWorkspace.unlock();
             dismissDialog(DIALOG_CREATE_SHORTCUT);