am b0ee0810: Add guards for restoreInstanceState (issue 11982812)

* commit 'b0ee08109ec89959d9bbd526c6e5f7ab96c8c3ea':
  Add guards for restoreInstanceState (issue 11982812)

src/com/android/launcher3/LauncherModel.java

@@ -2298,7 +2298,7 @@ public class LauncherModel extends BroadcastReceiver {
                 r = new Runnable() {
                     public void run() {
                         Callbacks callbacks = tryGetCallbacks(oldCallbacks);
-                        if (callbacks != null) {
+                        if (callbacks != null && currentScreen >= 0) {
                             callbacks.onPageBoundSynchronously(currentScreen);
                         }
                     }

src/com/android/launcher3/Workspace.java

@@ -4264,7 +4264,9 @@ public class Workspace extends SmoothPagedView
         if (mSavedStates != null) {
             mRestoredPages.add(child);
             CellLayout cl = (CellLayout) getChildAt(child);
-            cl.restoreInstanceState(mSavedStates);
+            if (cl != null) {
+                cl.restoreInstanceState(mSavedStates);
+            }
         }
     }