Bugfix: Ignore enter_notify when warping pointer (makes "goto" work correctly)

include/handlers.h

@@ -13,6 +13,14 @@
 
 #include <xcb/randr.h>
 
+/**
+ * Adds the sequence number of an event to the ignored events.
+ * Useful to ignore for example the enter notify caused by a pointer warp of
+ * i3.
+ *
+ */
+void add_ignore_event(const int sequence);
+
 /**
  * There was a key press. We compare this key code with our bindings table and
  * pass the bound action to parse_command().