avcodec/wavpack: Fix undefined integer negation

[ffmpeg] / libavdevice / alldevices.c

diff --git a/libavdevice/alldevices.c b/libavdevice/alldevices.c
index 280a260bd39b1687778f51e11e8aa35c7c05f369..a8ed53ae5deb3273cc6f5b1d525a66f94144f37f 100644 (file)
--- a/libavdevice/alldevices.c
+++ b/libavdevice/alldevices.c
@@ -73,7 +73,7 @@ static void register_all(void)
 
 void avdevice_register_all(void)
 {
-    AVOnce control = AV_ONCE_INIT;
+    static AVOnce control = AV_ONCE_INIT;
 
     ff_thread_once(&control, register_all);
 }