python.cfg: Add Py_RETURN_* macros to reduce missingReturn false positives in daca@home

Author: danmar

cfg/python.cfg

@@ -1,5 +1,9 @@
 <?xml version="1.0"?>
 <def format="2">
+  <define name="Py_RETURN_FALSE" value="return Py_INCREF(Py_False), Py_False"/>
+  <define name="Py_RETURN_NONE" value="return Py_INCREF(Py_None), Py_None"/>
+  <define name="Py_RETURN_TRUE" value="return Py_INCREF(Py_True), Py_True"/>
+
   <!-- Python C API. see https://docs.python.org/2/c-api/index.html -->
   <!-- ########## Python C API Types ########## -->
   <define name="PY_LONG_LONG" value="long long"/>