build: fix compile warning

Change-Id: Ic698231c25a47d27c15d0c43b6fd777086f991b6
diff --git a/src/chat-dialog.cpp b/src/chat-dialog.cpp
index 407349a..442e866 100644
--- a/src/chat-dialog.cpp
+++ b/src/chat-dialog.cpp
@@ -1298,5 +1298,5 @@
 
 #if WAF
 #include "chat-dialog.moc"
-#include "chat-dialog.cpp.moc"
+// #include "chat-dialog.cpp.moc"
 #endif