pinba plugin: fix warning on Solaris

[libprotobuf WARNING google/protobuf/compiler/parser.cc:547] No syntax
specified for the proto file: pinba.proto. Please use 'syntax =
"proto2";' or 'syntax = "proto3";' to specify a syntax version.
(Defaulted to proto2 syntax.)

diff --git a/src/pinba.proto b/src/pinba.proto
index 5fd5439..22e61c6 100644 (file)
--- a/src/pinba.proto
+++ b/src/pinba.proto
@@ -1,3 +1,5 @@
+syntax = "proto2";
+
 package Pinba;
 option optimize_for = SPEED;