include Exceptional.h in 3DSExporter.cpp (#5707)

Co-authored-by: Kim Kulling <[email protected]>

code/AssetLib/3DS/3DSExporter.cpp

@@ -52,6 +52,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <assimp/StringComparison.h>
 #include <assimp/DefaultLogger.hpp>
 #include <assimp/Exporter.hpp>
+#include <assimp/Exceptional.h>
 #include <assimp/IOSystem.hpp>
 
 #include <memory>