Issue #21709: Remove references to __file__ when part of a frozen application.

Lib/logging/__init__.py

@@ -55,8 +55,8 @@ __date__    = "07 February 2010"
 # _srcfile is used when walking the stack to check when we've got the first
 # caller stack frame.
 #
-if hasattr(sys, 'frozen'): #support for py2exe
-    _srcfile = "logging%s__init__%s" % (os.sep, __file__[-4:])
+if hasattr(sys, 'frozen'):
+    _srcfile = os.path.join('logging', '__init__.py')
 else:
     _srcfile = __file__
 _srcfile = os.path.normcase(_srcfile)