Prevent NPE

app/src/main/java/eu/faircode/email/FragmentMessages.java

@@ -4116,11 +4116,14 @@ public class FragmentMessages extends FragmentBase
                     long last = new Date().getTime() - MAX_FORWARD_ADDRESS_AGE;
                     List<String> fwds = db.message().getForwardAddresses(message.account, last);
                     if (fwds != null)
-                        for (String fwd : fwds)
+                        for (String fwd : fwds) {
-                            for (Address address : DB.Converters.decodeAddresses(fwd))
+                            Address[] afwds = DB.Converters.decodeAddresses(fwd);
+                            if (afwds != null)
+                                for (Address address : afwds)
                                     if (address instanceof InternetAddress)
                                         result.forwarded.add((InternetAddress) address);
                         }
+                }
 
                 return result;
             }