Use proper length for mountp string

We read 256 chars for the mountpoint name to (try to) be sure to get it
all, and so ths statvfs() function won't fail in read_filesystem()
function.
Yet only MAX_FS_LEN chars should be saved in stats_filesystem structure.

Signed-off-by: Sebastien GODARD <[email protected]>

Author: sysstat

rd_stats.c

@@ -2112,7 +2112,8 @@ void read_filesystem(struct stats_filesystem *st_filesystem, int nbr)
 			st_filesystem_i->f_files  = buf.f_files;
 			st_filesystem_i->f_ffree  = buf.f_ffree;
 			strcpy(st_filesystem_i->fs_name, fs_name);
-			strcpy(st_filesystem_i->mountp, mountp);
+			strncpy(st_filesystem_i->mountp, mountp, MAX_FS_LEN);
+			st_filesystem_i->mountp[MAX_FS_LEN - 1] = '\0';
 		}
 	}