fix some issues

src/android.c

@@ -182,14 +182,14 @@ int protect_socket(void (*protect_cb)(int ret, void *data), void *data, int fd)
     int remotefd;
     struct sockaddr_un addr;
 
-    // Setup
-    setnonblocking(remotefd);
-
     if ( (remotefd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
         LOGE("[android] socket() failed: %s (socket fd = %d)\n", strerror(errno), remotefd);
         return -1;
     }
 
+    // Setup
+    setnonblocking(remotefd);
+
     memset(&addr, 0, sizeof(addr));
     addr.sun_family = AF_UNIX;
     strncpy(addr.sun_path, "/data/data/com.github.shadowsocks/protect_path", sizeof(addr.sun_path)-1);