Fix two crashes that occur when walking very large (i.e. real-world) trees:

1) Avoid excessive, needless recursion, lest you overflow the stack;
2) Close all dir file descriptors, lest you run out of descriptors.
ok kristaps@

1 files changed, 4 insertions, 4 deletions

diff --git a/mandocdb.c b/mandocdb.c
index 2e58d1db..a8057716 100644
--- a/mandocdb.c
+++ b/mandocdb.c
@@ -1168,10 +1168,9 @@ pman_node(MAN_ARGS)
 		}
 	}
 
-	if (pman_node(hash, buf, dbuf, n->child))
-		return(1);
-	if (pman_node(hash, buf, dbuf, n->next))
-		return(1);
+	for (n = n->child; n; n = n->next)
+		if (pman_node(hash, buf, dbuf, n))
+			return(1);
 
 	return(0);
 }
@@ -1276,6 +1275,7 @@ ofile_dirbuild(const char *dir, int verb, struct of **of)
 		}
 	}
 
+	closedir(d);
 	return(1);
 }