[PATCH] runstate: Initialize Error * to NULL

[Peng Liang]

Based on the description of error_setg(), the local variable err in
qemu_init_subsystems() should be initialized to NULL.

Fix: efd7ab22fb "vl: extract qemu_init_subsystems"
Signed-off-by: Peng Liang <liangpeng10@huawei.com>
---
The patch is generated by the following coccinelle script (thanks to
Markus):
@ r @
identifier id;
@@
(
  static Error *id;
|
  Error *id
+ = NULL
  ;
)
And exclude the modifications in softmmu/vl.c (which has fixed by
Zhenzhong Duan already) and util/error.c (which are unnecessary).

 softmmu/runstate.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/softmmu/runstate.c b/softmmu/runstate.c
index ce8977c6a29c..54713100c2ea 100644
--- a/softmmu/runstate.c
+++ b/softmmu/runstate.c
@@ -746,7 +746,7 @@ static void qemu_run_exit_notifiers(void)
 
 void qemu_init_subsystems(void)
 {
-    Error *err;
+    Error *err = NULL;
 
     os_set_line_buffering();
 
-- 
2.31.1