smemcap: keep outputting by ignoring transient processes

function                                             old     new   delta
archivefile                                          167     176      +9

Signed-off-by: Andre Goddard Rosa <andre.rosa@lge.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

procps/smemcap.c

@@ -66,6 +66,10 @@ static void archivefile(const char *path)
 
 	/* buffer the file */
 	fd = xopen(path, O_RDONLY);
+	if (fd == -1) {
+		/* skip vanished processes between dir listing and traversal */
+		return;
+	}
 	do {
 		cur = xzalloc(sizeof(*cur));
 		*prev = cur;