remove std::make_pair

make_pair is an old C++98 function that can be replaced by modern
shorter constructs.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

src/decoder/plugins/FaadDecoderPlugin.cxx

@@ -317,7 +317,7 @@ faad_get_file_time(InputStream &is)
 		}
 	}
 
-	return std::make_pair(recognized, duration);
+	return {recognized, duration};
 }
 
 static void

src/decoder/plugins/HybridDsdDecoderPlugin.cxx

@@ -160,7 +160,7 @@ FindHybridDsdData(DecoderClient &client, InputStream &input)
 			if (!found_version || !audio_format.IsValid())
 				throw UnsupportedFile();
 
-			return std::make_pair(audio_format, remaining);
+			return {audio_format, remaining};
 		}
 
 		/* skip this chunk payload */