tools/bootconfig: Fix error return code in apply_xbc()

Fix to return a negative error code from the error handling case instead
of 0, as done elsewhere in this function.

Link: https://lkml.kernel.org/r/[email protected]

Fixes: a995e6b ("tools/bootconfig: Fix to check the write failure correctly")
Reported-by: Hulk Robot <[email protected]>
Acked-by: Masami Hiramatsu <[email protected]>
Signed-off-by: Zhen Lei <[email protected]>
Signed-off-by: Steven Rostedt (VMware) <[email protected]>

Author: Zhen Lei

tools/bootconfig/main.c

@@ -399,6 +399,7 @@ static int apply_xbc(const char *path, const char *xbc_path)
 	}
 	/* TODO: Ensure the @path is initramfs/initrd image */
 	if (fstat(fd, &stat) < 0) {
+		ret = -errno;
 		pr_err("Failed to get the size of %s\n", path);
 		goto out;
 	}