Added empty sink for wireshark sink
diff --git a/grc/CMakeLists.txt b/grc/CMakeLists.txt
index c95646d..17fad78 100644
--- a/grc/CMakeLists.txt
+++ b/grc/CMakeLists.txt
@@ -29,6 +29,7 @@
     misc_utils/gsm_controlled_rotator_cc.xml
     misc_utils/gsm_controlled_const_source_f.xml
     receiver/gsm_clock_offset_control.xml
-    misc_utils/gsm_message_printer.xml 
+    misc_utils/gsm_message_printer.xml
+    gsm_wireshark_sink.xml 
     misc_utils/gsm_clock_offset_corrector.xml DESTINATION share/gnuradio/grc/blocks
 )