update pdfannotator

diff --git a/lib/pdfannotator b/lib/pdfannotator
index ce69eca18a6f5b8774215725fd6b42534f13412f..88d59dc71da2cf4868009c36b4e1c322146298b4 160000 (submodule)
--- a/lib/pdfannotator
+++ b/lib/pdfannotator
@@ -1 +1 @@
-Subproject commit ce69eca18a6f5b8774215725fd6b42534f13412f
+Subproject commit 88d59dc71da2cf4868009c36b4e1c322146298b4