[LyX/master] Avoid memory leak in dummy functions

[Jean-Marc Lasgouttes]

commit 8340ad0797f8fad619f940b69671f7b3976afa74
Author: Jean-Marc Lasgouttes <lasgouttes at lyx.org>
Date:   Tue May 12 15:34:00 2026 +0200

    Avoid memory leak in dummy functions
    
    theLaTeXFonts/Colors() should not return a new object every time.
    
    Spotted by Coverity.
---
 src/tests/dummy4checklayout.cpp |  4 ++--
 src/tex2lyx/dummy_impl.cpp      | 11 +++++++----
 2 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/src/tests/dummy4checklayout.cpp b/src/tests/dummy4checklayout.cpp
index b15d5c1327..0a3f6bf88e 100644
--- a/src/tests/dummy4checklayout.cpp
+++ b/src/tests/dummy4checklayout.cpp
@@ -41,8 +41,8 @@ using namespace support;
 
 LaTeXColors & theLaTeXColors()
 {
-	LaTeXColors * lc = new LaTeXColors;
-	return * lc;
+	static LaTeXColors lc;
+	return lc;
 }
 
 //
diff --git a/src/tex2lyx/dummy_impl.cpp b/src/tex2lyx/dummy_impl.cpp
index 3214334b3e..486cb594a5 100644
--- a/src/tex2lyx/dummy_impl.cpp
+++ b/src/tex2lyx/dummy_impl.cpp
@@ -60,25 +60,28 @@ LyXRC lyxrc;
 
 LaTeXColors & theLaTeXColors()
 {
-	LaTeXColors * lc = new LaTeXColors;
-	return * lc;
+	static LaTeXColors lc;
+	return lc;
 }
 
+
 //
 // Dummy definitions needed by Language
 //
 
 LaTeXFonts & theLaTeXFonts()
 {
-	LaTeXFonts * lc = new LaTeXFonts;
-	return * lc;
+	static LaTeXFonts lc;
+	return lc;
 }
 
+
 LaTeXFont LaTeXFonts::getLaTeXFont(docstring const &)
 {
 	return LaTeXFont();
 }
 
+
 bool LaTeXFont::hasFontenc(std::string const &) const
 {
 	return false;