bitbake/goggle: don't drop events

We had a logic inversion that meant we where dropping quite a
significant number of events on the floor.... Fixed!

Signed-off-by: Joshua Lock <josh@linux.intel.com>

bitbake/lib/bb/ui/goggle.py

@@ -32,8 +32,8 @@ def event_handle_idle_func (eventHandler, build, pbar):
     # Consume as many messages as we can in the time available to us
     event = eventHandler.getEvent()
     while event:
-        event = eventHandler.getEvent()
         build.handle_event (event, pbar)
+        event = eventHandler.getEvent()
 
     return True