libuv: Simplify variable initializations to satisfy Clang scan-build

The Clang scan-build tool warns about assignments whose values are never
used, so initialize local variables at declaration instead.

Utilities/cmlibuv/src/unix/pipe.c

@@ -42,13 +42,10 @@ int uv_pipe_init(uv_loop_t* loop, uv_pipe_t* handle, int ipc) {
 
 int uv_pipe_bind(uv_pipe_t* handle, const char* name) {
   struct sockaddr_un saddr;
-  const char* pipe_fname;
-  int sockfd;
+  const char* pipe_fname = NULL;
+  int sockfd = -1;
   int err;
 
-  pipe_fname = NULL;
-  sockfd = -1;
-
   /* Already bound? */
   if (uv__stream_fd(handle) >= 0)
     return -EINVAL;

Utilities/cmlibuv/src/unix/tty.c

@@ -58,8 +58,8 @@ static int uv__tty_is_slave(const int fd) {
 
 int uv_tty_init(uv_loop_t* loop, uv_tty_t* tty, int fd, int readable) {
   uv_handle_type type;
-  int flags;
-  int newfd;
+  int flags = 0;
+  int newfd = -1;
   int r;
   int saved_flags;
   char path[256];
@@ -72,9 +72,6 @@ int uv_tty_init(uv_loop_t* loop, uv_tty_t* tty, int fd, int readable) {
   if (type == UV_FILE || type == UV_UNKNOWN_HANDLE)
     return -EINVAL;
 
-  flags = 0;
-  newfd = -1;
-
   /* Reopen the file descriptor when it refers to a tty. This lets us put the
    * tty in non-blocking mode without affecting other processes that share it
    * with us.