Fix a crash
am: 1f11788de2

Change-Id: I92c480a0d4901c0303f51966e3c52bd199f92331
diff --git a/compat/src/main/java/android/support/v4/provider/FontsContractCompat.java b/compat/src/main/java/android/support/v4/provider/FontsContractCompat.java
index 9ef1b0b..0926186 100644
--- a/compat/src/main/java/android/support/v4/provider/FontsContractCompat.java
+++ b/compat/src/main/java/android/support/v4/provider/FontsContractCompat.java
@@ -303,6 +303,9 @@
                     final ArrayList<ReplyCallback<TypefaceResult>> replies;
                     synchronized (sLock) {
                         replies = sPendingReplies.get(id);
+                        if (replies == null) {
+                            return;  // Nobody requested replies. Do nothing.
+                        }
                         sPendingReplies.remove(id);
                     }
                     for (int i = 0; i < replies.size(); ++i) {