Single member groups: Make all group-related sends a noop

libtextsecure/sendmessage.js

@@ -908,7 +908,12 @@ MessageSender.prototype = {
     const me = textsecure.storage.user.getNumber();
     const numbers = groupNumbers.filter(number => number !== me);
     if (numbers.length === 0) {
-      return Promise.reject(new Error('No other members in the group'));
+      return Promise.resolve({
+        successfulNumbers: [],
+        failoverNumbers: [],
+        errors: [],
+        unidentifiedDeliveries: [],
+      });
     }
 
     return this.sendMessage(
@@ -1022,8 +1027,14 @@ MessageSender.prototype = {
     const me = textsecure.storage.user.getNumber();
     const numbers = groupNumbers.filter(number => number !== me);
     if (numbers.length === 0) {
-      return Promise.reject(new Error('No other members in the group'));
+      return Promise.resolve({
+        successfulNumbers: [],
+        failoverNumbers: [],
+        errors: [],
+        unidentifiedDeliveries: [],
+      });
     }
+
     return this.sendMessage(
       {
         recipients: numbers,