winemac.drv: Constify a character string

[Frédéric Delanoy]

---
 dlls/winemac.drv/opengl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dlls/winemac.drv/opengl.c b/dlls/winemac.drv/opengl.c
index 4766bd4..ad520fa 100644
--- a/dlls/winemac.drv/opengl.c
+++ b/dlls/winemac.drv/opengl.c
@@ -1192,7 +1192,7 @@ static const pixel_format *get_pixel_format(int format, BOOL allow_nondisplayabl
 
 static BOOL init_gl_info(void)
 {
-    static char legacy_extensions[] = " WGL_EXT_extensions_string";
+    static const char legacy_extensions[] = " WGL_EXT_extensions_string";
     static const char legacy_ext_swap_control[] = " WGL_EXT_swap_control";
 
     CGDirectDisplayID display = CGMainDisplayID();
-- 
1.8.5