[libgtop] Make ndisk comment clear

[Robert Roth <robertroth src gnome org>]

commit 572b195407ce3d8c78270b1fce6aa8e692b62ed8
Author: James Dominic P. Guana <guana histark gmail com>
Date:   Tue Apr 20 08:00:09 2021 +0000

    Make ndisk comment clear

 glibtop.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/glibtop.h b/glibtop.h
index c196818c..352654f2 100644
--- a/glibtop.h
+++ b/glibtop.h
@@ -80,8 +80,8 @@ struct _glibtop
        int socket;                     /* Accepted connection of a socket */
        int ncpu;                       /* Number of CPUs, zero if single-processor */
        int real_ncpu;                  /* Real number of CPUs. Only ncpu are monitored */
-       int ndisk;                          /* Number of DISKs, zero if single-disk */
-       int real_ndisk;                 /* Number of PHYSICAL DISKs. Only ncpu is monitored */
+       int ndisk;                          /* Number of DISKs,  zero if single-disk. This pertains to disk 
volumes */
+       int real_ndisk;                 /* Number of PHYSICAL DISKs. Only ndisk is monitored for now */
        unsigned long os_version_code;  /* Version code of the operating system */
        const char *name;               /* Program name for error messages */
        const char *server_command;     /* Command used to invoke server */