[PATCH v7 2/2] win32u: Don't allow a replaced font to be a replacement.

[Jiajin Cui]

From: Jiajin Cui

This is to prevent replacement loops.
---
 dlls/win32u/font.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/dlls/win32u/font.c b/dlls/win32u/font.c
index e26c7bfa316..e281db9b0c8 100644
--- a/dlls/win32u/font.c
+++ b/dlls/win32u/font.c
@@ -903,6 +903,12 @@ static BOOL add_family_replacement( const WCHAR *new_name, const WCHAR *replace
         return FALSE;
     }

+    if (family->replacement)
+    {
+        TRACE( "%s is replaced by another font, skipping.\n", debugstr_w(replace) );
+        return FALSE;
+    }
+
     if (!(new_family = create_family( new_name, NULL ))) return FALSE;
     new_family->replacement = family;
     family->refcount++;