[LyX/2.3.x] Amend 14b108fc222ef9e

[Juergen Spitzmueller]

commit 263e1045e26156cab577385fca29e10bc2e82f9e
Author: Juergen Spitzmueller <spitz at lyx.org>
Date:   Mon Dec 5 08:23:50 2022 +0100

    Amend 14b108fc222ef9e
---
 src/mathed/InsetMathMacro.cpp |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/mathed/InsetMathMacro.cpp b/src/mathed/InsetMathMacro.cpp
index d9a307f..65f677e 100644
--- a/src/mathed/InsetMathMacro.cpp
+++ b/src/mathed/InsetMathMacro.cpp
@@ -1081,8 +1081,10 @@ void InsetMathMacro::write(WriteStream & os) const
 	docstring name_recoded;
 	docstring uncodable;
 	for (char_type c : name_in) {
-		if (!os.encoding())
-			break;
+		if (!os.encoding()) {
+			name_recoded += c;
+			continue;
+		}
 		if (os.encoding()->encodable(c))
 			name_recoded += c;
 		else {