Make sure no uninitialized values are used

I've got it if -O2 compilation option used.

 | cr-restore.c:1069:5: error: ‘ret’ may be used uninitialized in this function [-Werror=uninitialized]
 | sockets.c:1145:7: error: ‘sk’ may be used uninitialized in this function [-Werror=uninitialized]

In first case 'ret' indeed might be uninitialized, and
in second case "goto err" was called too early. Fix them both.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>

cr-restore.c

@@ -943,9 +943,10 @@ static rt_sigaction_t sigchld_act;
 static int prepare_sigactions(int pid)
 {
 	rt_sigaction_t act, oact;
-	int fd_sigact, ret;
+	int fd_sigact;
 	struct sa_entry e;
 	int sig, i;
+	int ret = -1;
 
 	fd_sigact = open_image_ro(CR_FD_SIGACT, pid);
 	if (fd_sigact < 0)

sockets.c

@@ -1103,12 +1103,12 @@ static int open_inet_sk(struct inet_sk_entry *ie, int *img_fd)
 
 	if (ie->family != AF_INET) {
 		pr_err("Unsupported socket family: %d\n", ie->family);
-		goto err;
+		return -1;
 	}
 
 	if (ie->type != SOCK_STREAM) {
 		pr_err("Unsupported socket type: %d\n", ie->type);
-		goto err;
+		return -1;
 	}
 
 	sk = socket(ie->family, ie->type, ie->proto);