Made content-type optional on upload.

lib/python/OFS/Image.py

 """Image object"""
 
-__version__='$Revision: 1.37 $'[11:-2]
+__version__='$Revision: 1.38 $'[11:-2]
 
 import Globals
 from Globals import HTMLFile, MessageDialog
@@ -119,7 +119,8 @@ class File(Persistent,Implicit,RoleManager,Item_w__name__):
 
 	The file or images contents are replaced with the contents of 'file'.
 	"""
-	self.content_type=file.headers['content-type']
+	try: self.content_type=file.headers['content-type']
+	except KeyError: pass
 	data=file.read()
 	self.data=Pdata(data)
 	self.size=len(data)