Tolerate a bitmask with multiple elements as per the specification.

api/format/slave.c

@@ -172,18 +172,14 @@ int eb_device_slave(eb_socket_t socketp, eb_transport_t transportp, eb_device_t
       
       dev->widths = buffer[3];
       
-      return 1;
+      return 0; /* don't poll again */
     } 
     
     /* Not V1 ? */
     if ((buffer[2] & 0xf0) != 0x10) goto kill;
     
-    /* Neither probe nor response, yet multiple widths? fail */
-    widths = buffer[3];
-    if (!eb_width_refined(widths)) goto kill;
-    
     /* Unsupported widths? fail */
-    widths &= socket->widths;
+    widths = eb_width_refine(buffer[3] & socket->widths);
     if (!eb_width_possible(widths)) goto kill;
     
     /* As a reply, this will contain no reads */