Also check for `sys._MEIPASS` before assuming PyInstallerness (#526)

Fixes #525

diff --git a/babel/localedata.py b/babel/localedata.py
index ae21547812b0404e22f2ea9ff0b0b74c66cb4a5f..4b6d3b68ae60dd0a504d178d18562ff8e614f2cc 100644 (file)
--- a/babel/localedata.py
+++ b/babel/localedata.py
@@ -22,7 +22,7 @@ from babel._compat import pickle, string_types
 
 
 def get_base_dir():
-    if getattr(sys, 'frozen', False):
+    if getattr(sys, 'frozen', False) and getattr(sys, '_MEIPASS', None):
         # we are running in a |PyInstaller| bundle
         basedir = sys._MEIPASS
     else: