Less output

src/table_sync.rs

@@ -433,6 +433,7 @@ where
 			if let TableRPC::<F>::SyncRPC(SyncRPC::Difference(mut diff_ranges, diff_items)) =
 				rpc_resp
 			{
+				if diff_ranges.len() > 0 || diff_items.len() > 0 {
 					eprintln!(
 						"({}) Sync with {:?}: difference {} ranges, {} items",
 						self.table.name,
@@ -440,6 +441,7 @@ where
 						diff_ranges.len(),
 						diff_items.len()
 					);
+				}
 				let mut items_to_send = vec![];
 				for differing in diff_ranges.drain(..) {
 					if differing.level == 0 {
@@ -583,6 +585,7 @@ where
 			.iter()
 			.map(|x| x.children.len())
 			.fold(0, |x, y| x + y);
+		if ret_ranges.len() > 0 || ret_items.len() > 0 {
 			eprintln!(
 				"({}) Checksum comparison RPC: {} different + {} items for {} received",
 				self.table.name,
@@ -590,6 +593,7 @@ where
 				ret_items.len(),
 				n_checksums
 			);
+		}
 		Ok(SyncRPC::Difference(ret_ranges, ret_items))
 	}