Fix -Werror=maybe-uninitialized in QCC 12.2.0 (#309)

Signed-off-by: Ricardo González Moreno <ricardo@richiware.dev>

Author: richiware

include/fastcdr/xcdr/optional.hpp

@@ -91,7 +91,12 @@ class optional
     }
 
     //! Destructor
-    ~optional() = default;
+    ~optional()
+#if defined(__GNUC__) && __GNUC__ == 12
+    __attribute__(
+        (noinline))
+#endif // if defined(__GNUC__) && __GNUC__ == 12
+    = default;
 
     /*!
      * @brief Constructs the contained value in-place
@@ -224,6 +229,10 @@ class optional
     //! Assigns content from an optional.
     optional& operator =(
             optional&& opt)
+#if defined(__GNUC__) && __GNUC__ == 12
+    __attribute__(
+            (noinline))
+#endif // if defined(__GNUC__) && __GNUC__ == 12
     {
         reset();
         storage_.engaged_ = opt.storage_.engaged_;