zdtm/lib: fix a case when a string may be unterminated

CID 153098 (checkpoint-restore#3 of 3): Buffer not null terminated (BUFFER_SIZE_WARNING)
10. buffer_size_warning: Calling strncpy with a maximum size argument of 64 bytes on destination array m->fsname of size 64 bytes might leave the destination string unterminated.

Signed-off-by: Andrei Vagin <[email protected]>

Author: avagin

test/zdtm/lib/fs.c

@@ -34,7 +34,7 @@ mnt_info_t *get_cwd_mnt_info(void)
 
 	mnt_info_t *m = NULL;
 
-	char mountpoint[PATH_MAX];
+	char mountpoint[64];
 	char root[PATH_MAX];
 
 	char *fsname = NULL;