imghdr.what(): check for not h'. This lets

you do:
    imghdr.what(None, '')
And still go down the

diff --git a/Lib/imghdr.py b/Lib/imghdr.py
index 10cc08596ecfc5a4fcccc20f6d987c5487ac7e48..f3137c5afb04590d9210fefbd96e1ebf0d733ccb 100644 (file)
--- a/Lib/imghdr.py
+++ b/Lib/imghdr.py
@@ -6,7 +6,7 @@
 #-------------------------#
 
 def what(filename, h=None):
-       if not h:
+       if h is None:
                f = open(filename, 'r')
                h = f.read(32)
        else: