Fix assertion in malloc.c:tcache_get.

One of the warnings that appears with -Wextra is "ordered comparison
of pointer with integer zero" in malloc.c:tcache_get, for the
assertion:

  assert (tcache->entries[tc_idx] > 0);

Indeed, a "> 0" comparison does not make sense for
tcache->entries[tc_idx], which is a pointer.  My guess is that
tcache->counts[tc_idx] is what's intended here, and this patch changes
the assertion accordingly.

Tested for x86_64.

	* malloc/malloc.c (tcache_get): Compare tcache->counts[tc_idx]
	with 0, not tcache->entries[tc_idx].

1 files changed, 3 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index d73c815c37..17d53b181a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2019-02-04  Joseph Myers  <joseph@codesourcery.com>
 
+	* malloc/malloc.c (tcache_get): Compare tcache->counts[tc_idx]
+	with 0, not tcache->entries[tc_idx].
+
 	* nscd/connections.c (reqinfo): Initialize SHUTDOWN element only
 	once.