File giada-fmt.patch of Package giada

diff --git a/src/core/engine.cpp b/src/core/engine.cpp
index 37ca90d..aff4325 100644
--- a/src/core/engine.cpp
+++ b/src/core/engine.cpp
@@ -34,6 +34,7 @@
 #include "utils/string.h"
 #include <fmt/core.h>
 #include <memory>
+#include <type_traits>
 
 namespace giada::m
 {