[Memory leak]uniq_ptr for tmsg (#985)

* uniq_ptr for tmsg

* Added header

old-commit-hash: 7f6c9ebaf7

tools/nui/FileReader.cpp

@@ -1,5 +1,6 @@
 #include "FileReader.hpp"
 #include "FrameReader.hpp"
+#include <memory>
 
 #include <QtNetwork>
 
@@ -83,8 +84,7 @@ void LogReader::mergeEvents(int dled) {
       capnp::FlatArrayMessageReader cmsg = capnp::FlatArrayMessageReader(amsg);
 
       // this needed? it is
-      capnp::FlatArrayMessageReader *tmsg =
-        new capnp::FlatArrayMessageReader(kj::arrayPtr(amsg.begin(), cmsg.getEnd()));
+      std::unique_ptr<capnp::FlatArrayMessageReader> tmsg(new capnp::FlatArrayMessageReader(kj::arrayPtr(amsg.begin(), cmsg.getEnd()));
 
       amsg = kj::arrayPtr(cmsg.getEnd(), amsg.end());