Fix use of half-initialized result in getaddrinfo when using nscd (bug 16743)

This fixes a bug in the way the results from __nscd_getai are collected:
for every returned result a new entry is first added to the
gaih_addrtuple list, but if that result doesn't match the request this
entry remains uninitialized.  So for this non-matching result an extra
result with uninitialized content is returned.

To reproduce (with nscd running):

	$ getent ahostsv4 localhost
	127.0.0.1       STREAM localhost
	127.0.0.1       DGRAM
	127.0.0.1       RAW
	(null)          STREAM
	(null)          DGRAM
	(null)          RAW

1 files changed, 6 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index ab98fa6..d406f35 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2014-03-20  Andreas Schwab  <schwab@suse.de>
+
+	[BZ #16743]
+	* sysdeps/posix/getaddrinfo.c (gaih_inet): Properly skip over
+	non-matching result from nscd.
+
 2014-03-24  Siddhesh Poyarekar  <siddhesh@redhat.com>
 
 	* scripts/bench.py: Moved to ...