small fix tools

Author: lorenss-m

hud/tools/computer/hud.py

@@ -73,7 +73,7 @@ def __init__(
         self.needs_scaling = self.scale != 1.0
 
         if executor is None:
-            self.executor = self._choose_executor(platform_type, display_num)
+            self._choose_executor(platform_type, display_num)
         else:
             self.executor = executor