[PATCH] console: avoid passing con=NULL to graphic_hw_update_done() In graphic_hw_update(), first select an existing console, a specific-console or active_console(if not specified), then updating the console.

[lichun]

Signed-off-by: lichun <lic...@ruijie.com.cn>
---
 ui/console.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/ui/console.c b/ui/console.c
index e8e5970..e07d2c3 100644
--- a/ui/console.c
+++ b/ui/console.c
@@ -270,10 +270,11 @@ void graphic_hw_update_done(QemuConsole *con)
 void graphic_hw_update(QemuConsole *con)
 {
     bool async = false;
+    con = con ? con : active_console;
     if (!con) {
-        con = active_console;
+        return;
     }
-    if (con && con->hw_ops->gfx_update) {
+    if (con->hw_ops->gfx_update) {
         con->hw_ops->gfx_update(con->hw);
         async = con->hw_ops->gfx_update_async;
     }
-- 
1.8.3.1