Fix "object has no attribute lock" error

The lock and results can be used even if we're not using multithreading, so it should be initialized above the if block instead of inside.

addon/ops/export_auto.py

@@ -64,6 +64,9 @@ def execute(self, context):
 
         start = time.time()
 
+        self._lock = Lock()
+        self._results = []
+
         if (not self.ctrl and self.shift) or (self.ctrl and self.all_models):
             source_models = [Model(game, model) for model in sourceops.model_items]
 
@@ -74,8 +77,6 @@ def execute(self, context):
                     return {'CANCELLED'}
 
             threads = [Thread(target=self.compile, args=[m], daemon=True) for m in source_models]
-            self._lock = Lock()
-            self._results = []
 
             for thread in threads:
                 thread.start()