Properly return unknown recipient from SMS db on empty.

src/org/thoughtcrime/securesms/database/SmsDatabase.java

@@ -434,7 +434,14 @@ public class SmsDatabase extends Database implements MmsSmsColumns {
 
     private Recipients getRecipientsFor(String address) {
       try {
-        return RecipientFactory.getRecipientsFromString(context, address, false);
+        Recipients recipients = RecipientFactory.getRecipientsFromString(context, address, false);
+
+        if (recipients == null || recipients.isEmpty()) {
+          return new Recipients(new Recipient("Unknown", "Unknown", null,
+                                              ContactPhotoFactory.getDefaultContactPhoto(context)));
+        }
+
+        return recipients;
       } catch (RecipientFormattingException e) {
         Log.w("EncryptingSmsDatabase", e);
         return new Recipients(new Recipient("Unknown", "Unknown", null,

src/org/thoughtcrime/securesms/recipients/Recipients.java

@@ -64,11 +64,11 @@ public class Recipients implements Parcelable {
     this.recipients.addAll(recipients.getRecipientsList());
   }
 
-  public Recipients truncateToSingleRecipient() {
+//  public Recipients truncateToSingleRecipient() {
-    assert(!this.recipients.isEmpty());
+//    assert(!this.recipients.isEmpty());
-    this.recipients = this.recipients.subList(0, 1);
+//    this.recipients = this.recipients.subList(0, 1);
-    return this;
+//    return this;
-  }
+//  }
 
   public void addListener(RecipientModifiedListener listener) {
     for (Recipient recipient : recipients) {