[LyX/master] Fixup c39d5b76: the wrong branch of #if was retained.

[Jean-Marc Lasgouttes]

commit 88e092ae02bbc1f0aaecb40e5ab49e4540d6575a
Author: Jean-Marc Lasgouttes <lasgouttes at lyx.org>
Date:   Wed Oct 23 15:34:27 2024 +0200

    Fixup c39d5b76: the wrong branch of #if was retained.
---
 src/frontends/qt/LayoutBox.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/frontends/qt/LayoutBox.cpp b/src/frontends/qt/LayoutBox.cpp
index 70d5fd6ad9..444109260c 100644
--- a/src/frontends/qt/LayoutBox.cpp
+++ b/src/frontends/qt/LayoutBox.cpp
@@ -320,7 +320,7 @@ void LayoutBox::Private::setFilter(QString const & s)
 		lastSel_ = filterModel_->mapToSource(filterModel_->index(sel, 0)).row();
 
 	filter_ = s;
-	filterModel_->setFilterRegExp(charFilterRegExp(filter_));
+	filterModel_->setFilterRegularExpression(charFilterRegExp(filter_));
 	countCategories();
 
 	// restore old selection