proto: update the library to be in sync with Google's internal code.

R=rsc
CC=golang-dev
http://codereview.appspot.com/1158043
diff --git a/proto/all_test.go b/proto/all_test.go
index 83a0638..10e2297 100644
--- a/proto/all_test.go
+++ b/proto/all_test.go
@@ -975,6 +975,7 @@
 	}
 }
 
+
 // Test that enums work.  Checks for a bug introduced by making enums
 // named types instead of int32: newInt32FromUint64 would crash with
 // a type mismatch in reflect.PointTo.