smemcap: close /proc handle upon cleaning up

Signed-off-by: Alexander Shishkin <virtuoso@slind.org>
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
diff --git a/procps/smemcap.c b/procps/smemcap.c
index f951a5f..196c91f 100644
--- a/procps/smemcap.c
+++ b/procps/smemcap.c
@@ -125,5 +125,8 @@
 		}
 	}
 
+	if (ENABLE_FEATURE_CLEAN_UP)
+		closedir(d);
+
 	return EXIT_SUCCESS;
 }