Fix integer overflow

include/grpc++/impl/codegen/proto_utils.h

@@ -214,7 +214,7 @@ class SerializationTraits<T, typename std::enable_if<std::is_base_of<
         return reader.status();
       }
       ::grpc::protobuf::io::CodedInputStream decoder(&reader);
-      decoder.SetTotalBytesLimit(UINT32_MAX, UINT32_MAX);
+      decoder.SetTotalBytesLimit(INT_MAX, INT_MAX);
       if (!msg->ParseFromCodedStream(&decoder)) {
         result = Status(StatusCode::INTERNAL, msg->InitializationErrorString());
       }

include/grpc++/impl/codegen/sync_stream.h

@@ -160,7 +160,7 @@ class ClientReader final : public ClientReaderInterface<R> {
   }
 
   bool NextMessageSize(uint32_t* sz) override {
-    *sz = UINT32_MAX;
+    *sz = INT_MAX;
     return true;
   }
 
@@ -310,7 +310,7 @@ class ClientReaderWriter final : public ClientReaderWriterInterface<W, R> {
   }
 
   bool NextMessageSize(uint32_t* sz) override {
-    *sz = UINT32_MAX;
+    *sz = INT_MAX;
     return true;
   }
 
@@ -382,7 +382,7 @@ class ServerReader final : public ServerReaderInterface<R> {
   }
 
   bool NextMessageSize(uint32_t* sz) override {
-    *sz = UINT32_MAX;
+    *sz = INT_MAX;
     return true;
   }
 
@@ -474,7 +474,7 @@ class ServerReaderWriterBody final {
   }
 
   bool NextMessageSize(uint32_t* sz) {
-    *sz = UINT32_MAX;
+    *sz = INT_MAX;
     return true;
   }