secur32/tests: Constify a character string

[Frédéric Delanoy]

---
 dlls/secur32/tests/ntlm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dlls/secur32/tests/ntlm.c b/dlls/secur32/tests/ntlm.c
index f01fa12..1e865ad 100644
--- a/dlls/secur32/tests/ntlm.c
+++ b/dlls/secur32/tests/ntlm.c
@@ -113,7 +113,7 @@ static BYTE message_binary[] =
    {0x48, 0x65, 0x6c, 0x6c, 0x6f, 0x2c, 0x20, 0x77, 0x6f, 0x72,
     0x6c, 0x64, 0x21};
 
-static char message[] = "Hello, world!";
+static const char message[] = "Hello, world!";
 
 static char message_header[] = "Header Test";
 
-- 
1.8.5.2