master 18d412a513: Fix non-system-malloc build

[Po Lu]

branch: master
commit 18d412a5138f21be77f36e4f8036971d576ef25e
Author: Po Lu <luangruo@yahoo.com>
Commit: Po Lu <luangruo@yahoo.com>

    Fix non-system-malloc build
    
    * src/xterm.c (x_gc_free_ext_data_private): New function.
    (x_gc_get_ext_data): Set it as the private data free function.
---
 src/xterm.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/xterm.c b/src/xterm.c
index 9e481c39af..cfe329ab0f 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -4888,6 +4888,14 @@ x_update_opaque_region (struct frame *f, XEvent 
*configure)
 
 
 #if defined USE_CAIRO || defined HAVE_XRENDER
+static int
+x_gc_free_ext_data_private (XExtData *extension)
+{
+  xfree (extension->private_data);
+
+  return 0;
+}
+
 static struct x_gc_ext_data *
 x_gc_get_ext_data (struct frame *f, GC gc, int create_if_not_found_p)
 {
@@ -4907,6 +4915,7 @@ x_gc_get_ext_data (struct frame *f, GC gc, int 
create_if_not_found_p)
          ext_data = xzalloc (sizeof (*ext_data));
          ext_data->number = dpyinfo->ext_codes->extension;
          ext_data->private_data = xzalloc (sizeof (struct x_gc_ext_data));
+         ext_data->free_private = x_gc_free_ext_data_private;
          XAddToExtensionList (head, ext_data);
        }
     }