Minor cleanup (no functional change): rename 'struct _Thr :: opaque'
to 'hgthread', since that's what it is really.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@11619 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/helgrind/hg_errors.c b/helgrind/hg_errors.c
index 6bc9482..6076f47 100644
--- a/helgrind/hg_errors.c
+++ b/helgrind/hg_errors.c
@@ -341,7 +341,7 @@
             Thread* threadp;
             tl_assert(wherep);
             tl_assert(thrp);
-            threadp = libhb_get_Thr_opaque( thrp );
+            threadp = libhb_get_Thr_hgthread( thrp );
             tl_assert(threadp);
             xe->XE.Race.h2_ct_accEC  = wherep;
             xe->XE.Race.h2_ct        = threadp;