[Kernel] Fix the compiling warning

BernardXiong · BernardXiong · commit 60f3d61acd01 · 2018-08-29T02:35:51.000+01:00
diff --git a/src/signal.c b/src/signal.c
@@ -147,7 +147,7 @@ static void _signal_deliver(rt_thread_t tid)
 
 rt_sighandler_t rt_signal_install(int signo, rt_sighandler_t handler)
 {
-    rt_sighandler_t old;
+    rt_sighandler_t old = RT_NULL;
     rt_thread_t tid = rt_thread_self();
 
     if (!sig_valid(signo)) return SIG_ERR;

Original file line number	Diff line number	Diff line change
`@@ -147,7 +147,7 @@ static void _signal_deliver(rt_thread_t tid)`
`147`	`147`
`148`	`148`	`rt_sighandler_t rt_signal_install(int signo, rt_sighandler_t handler)`
`149`	`149`	`{`
`150`		`- rt_sighandler_t old;`
	`150`	`+ rt_sighandler_t old = RT_NULL;`
`151`	`151`	`rt_thread_t tid = rt_thread_self();`
`152`	`152`
`153`	`153`	`if (!sig_valid(signo)) return SIG_ERR;`