Un-break the build on OSX following r11910.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@11921 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/coregrind/m_syswrap/syswrap-darwin.c b/coregrind/m_syswrap/syswrap-darwin.c
index eb68bc3..aa43e97 100644
--- a/coregrind/m_syswrap/syswrap-darwin.c
+++ b/coregrind/m_syswrap/syswrap-darwin.c
@@ -105,7 +105,7 @@
                   tid, &tid);
 
    /* Make sure error reporting is enabled in the new thread. */
-   ctst->err_disablement_level = 0;
+   tst->err_disablement_level = 0;
 
    VG_TRACK(pre_thread_first_insn, tid);
 
@@ -234,7 +234,7 @@
       thread slot is safe in this respect if later reallocated.  This
       should be unnecessary since the flag should be cleared when the
       slot is reallocated, in thread_wrapper(). */
-   if (tst->disablement_level > 0) {
+   if (tst->err_disablement_level > 0) {
       VG_(umsg)(
          "WARNING: exiting thread has error reporting disabled.\n"
          "WARNING: possibly as a result of some mistake in the use\n"