Merge pull request #268 from ktopley-apple/dispatch-sync-fixup-overlay

Fix warnings in DispatchQueue.sync() implementation when using a comp…

Signed-off-by: Daniel A. Steffen <dsteffen@apple.com>
diff --git a/PATCHES b/PATCHES
index 772c934..b44a895 100644
--- a/PATCHES
+++ b/PATCHES
@@ -347,3 +347,4 @@
 [ded5bab] APPLIED rdar://33531111
 [ce90d0c] APPLIED rdar://33531111
 [69c8f3e] APPLIED rdar://33531111
+[23a3a84] APPLIED rdar://33531111