add _directUserId to MXRoomSummary hash function

Author: IgorFedorchuk

MatrixSDK/Data/MXRoomSummary.m

@@ -1045,6 +1045,7 @@ - (NSUInteger)hash
     NSUInteger prime = 2;
     NSUInteger result = 1;
 
+    result = prime * result + [_directUserId hash];
     result = prime * result + [_roomId hash];
     result = prime * result + [_roomTypeString hash];
     result = prime * result + [_avatar hash];