[LyX/master] Guard some debug code

[Scott Kostyshak]

commit 378c19bfc234e42e983b45254f668e21b932bc3b
Author: Scott Kostyshak <skostysh at lyx.org>
Date:   Sat Nov 5 14:26:43 2022 -0400

    Guard some debug code
    
    Amend f352a375 and 3bf1b97a.
---
 src/insets/InsetIndex.cpp |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/src/insets/InsetIndex.cpp b/src/insets/InsetIndex.cpp
index bec373d..d72527a 100644
--- a/src/insets/InsetIndex.cpp
+++ b/src/insets/InsetIndex.cpp
@@ -1448,7 +1448,9 @@ public:
 private:
 	bool isModern()
 	{
+#ifdef LYX_INSET_INDEX_DEBUG
 		std::cout << to_utf8(entry_) << std::endl;
+#endif // LYX_INSET_INDEX_DEBUG
 
 		// If a modern parameter is present, this is definitely a modern index inset. Similarly, if it contains the
 		// usual LaTeX symbols (!|@), then it is definitely a legacy index inset. Otherwise, if it has features of