plymouth leaks an fd

[James Hunt]

src/client/plymouth.c:get_kernel_command_line() leaks an fd at line 731:

719 fd = open ("proc/cmdline", O_RDONLY);
720
721 if (fd < 0)
722 {
723 ply_trace ("couldn't open it: %m");
724 return false;
725 }
726
727 ply_trace ("reading kernel command line");
728 if (read (fd, state->kernel_command_line, sizeof (state->kernel_command_line)) < 0)
729 {
730 ply_trace ("couldn't read it: %m");
731 return false;
732 }

The if test at 728 should do the following:

729 {
730 ply_trace ("couldn't read it: %m");
731 close (fd);
732 return false;
733 }