[LyX/master] Fixup b8cdfd1e1db: fix thinko

[Jean-Marc Lasgouttes]

commit 12d771c43fc121c89e6df5ae1e0b6aedc11d799e
Author: Jean-Marc Lasgouttes <lasgouttes at lyx.org>
Date:   Mon Sep 9 15:19:25 2024 +0200

    Fixup b8cdfd1e1db: fix thinko
    
    Spotted by Coverity.
---
 src/KeyMap.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/KeyMap.cpp b/src/KeyMap.cpp
index f779cbbf4c..8e12624304 100644
--- a/src/KeyMap.cpp
+++ b/src/KeyMap.cpp
@@ -495,7 +495,7 @@ docstring KeyMap::printBindings(FuncRequest const & func,
 		if (!firstone)
 			res << ", ";
 		res << key.print(format, untranslated);
-		firstone = true;
+		firstone = false;
 	}
 	return res.str();
 }