[gnome-builder] lsp: defend against a floating ref

[Christian Hergert <chergert src gnome org>]

commit 622e201651f9082c4370a3dabd3e7ca456627010
Author: Christian Hergert <chergert redhat com>
Date:   Wed Dec 4 15:50:18 2019 -0800

    lsp: defend against a floating ref

 src/libide/lsp/ide-lsp-client.c | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/src/libide/lsp/ide-lsp-client.c b/src/libide/lsp/ide-lsp-client.c
index cca22c10e..be5d9a940 100644
--- a/src/libide/lsp/ide-lsp-client.c
+++ b/src/libide/lsp/ide-lsp-client.c
@@ -719,6 +719,9 @@ ide_lsp_client_handle_call (IdeLspClient  *self,
 
       if (config != NULL)
         {
+          /* Ensure we didn't get anything floating */
+          g_variant_take_ref (config);
+
           jsonrpc_client_reply_async (client, id, config, NULL, NULL, NULL);
           IDE_RETURN (TRUE);
         }