um: Do not use stdin and stdout identifiers for struct members

stdin, stdout and stderr are macros according to C89/C99.
Thus do not use them as struct member identifiers to avoid
bad results from macro expansion.

Signed-off-by: Hans-Werner Hilse <hwhilse@gmail.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
diff --git a/arch/um/drivers/net_user.c b/arch/um/drivers/net_user.c
index cd14157..e697a41 100644
--- a/arch/um/drivers/net_user.c
+++ b/arch/um/drivers/net_user.c
@@ -166,7 +166,7 @@
 
 struct change_pre_exec_data {
 	int close_me;
-	int stdout;
+	int stdout_fd;
 };
 
 static void change_pre_exec(void *arg)
@@ -174,7 +174,7 @@
 	struct change_pre_exec_data *data = arg;
 
 	close(data->close_me);
-	dup2(data->stdout, 1);
+	dup2(data->stdout_fd, 1);
 }
 
 static int change_tramp(char **argv, char *output, int output_len)
@@ -189,7 +189,7 @@
 		return err;
 	}
 	pe_data.close_me = fds[0];
-	pe_data.stdout = fds[1];
+	pe_data.stdout_fd = fds[1];
 	pid = run_helper(change_pre_exec, &pe_data, argv);
 
 	if (pid > 0)	/* Avoid hang as we won't get data in failure case. */