Fix compile issues with -std=c++11

This compiles with -std=c++11:
message Foo {
  map<string, Foo> value = 1;
}

This does not compile:
message Foo {
  map<int32, Foo> value = 1;
}

Needs to dig more into the underlying issue.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/google/protobuf/map_unittest.proto b/src/google/protobuf/map_unittest.proto
index d3b525a0..aea1e8ce 100644
--- a/src/google/protobuf/map_unittest.proto
+++ b/src/google/protobuf/map_unittest.proto
@@ -116,7 +116,7 @@ message MessageContainingEnumCalledType {
   enum Type {
     TYPE_FOO = 0;
   }
-  map<int32, MessageContainingEnumCalledType> type = 1;
+  map<string, MessageContainingEnumCalledType> type = 1;
 }
 
 // Previously, message cannot contain map field called "entry".
@@ -125,5 +125,5 @@ message MessageContainingMapCalledEntry {
 }
 
 message TestRecursiveMapMessage {
-  map<int32, TestRecursiveMapMessage> a = 1;
+  map<string, TestRecursiveMapMessage> a = 1;
 }