Fixing simple typo in BUGS section

Reference: /n/sources/patch/applied/man2-ndb-typo
Date: Wed Oct 18 07:26:10 CES 2006
Signed-off-by: JoelCSalomon@Gmail.com

--- /sys/man/2/ndb	Wed Oct 18 07:25:42 2006
+++ /sys/man/2/ndb	Wed Oct 18 07:25:41 2006
@@ -487,5 +487,5 @@
 They expect a fixed 64 byte long result
 buffer and existed when the values of a
 .I Ndbtuple
-structure where fixed length.
+structure were fixed length.