bitbake: cookerdata: Avoid tracebacks from early reset() calls

cooker.reset() can be called before we've actually setup the datastore. Gracefully
handle this case instead of the current traceback+exit.

(Bitbake rev: 8fd30ca6d271c125a8ea03ef0c5d7ab176900701)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/cookerdata.py

@@ -327,6 +327,9 @@ class CookerDataBuilder(object):
         self.mcdata[''] = self.data
 
     def reset(self):
+        # We may not have run parseBaseConfiguration() yet
+        if not hasattr(self, 'origdata'):
+            return
         self.data = bb.data.createCopy(self.origdata)
         self.mcdata[''] = self.data