all: check stdout and stderr status at exit

If stream status is not checked at the end of execution below problem
would not report error, or non-zero exit code.  The uptime is just an
example same was true with all commands of the project.

$ uptime >&- ; echo $?
uptime: write error: Bad file descriptor
1
$ uptime >/dev/full ; echo $?
uptime: write error: No space left on device
1

Signed-off-by: Sami Kerola <kerolasa@iki.fi>

top/top.c

@@ -41,6 +41,7 @@
 #include <unistd.h>
 #include <values.h>
 
+#include "../include/fileutils.h"
 #include "../include/nls.h"
 
 #include "../proc/devname.h"
@@ -3902,6 +3903,7 @@ static void frame_make (void) {
          * duh... */
 int main (int dont_care_argc, char **argv) {
    (void)dont_care_argc;
+   atexit(close_stdout);
    before(*argv);
                                         //                 +-------------+
    wins_stage_1();                      //                 top (sic) slice