Check for the existence of the array in domain2prefix instead; uploader.py failed on python 2.6

git-svn-id: https://wikiteam.googlecode.com/svn/trunk@857 31edc4fc-5e31-b4c4-d58b-c8bc928bcb95

dumpgenerator.py

@@ -707,9 +707,9 @@ def saveLogs(config={}):
 def domain2prefix(config={}):
     """ Convert domain name to a valid prefix filename """
     domain = ''
-    if config['api']:
+    if 'api' in config:
         domain = config['api']
-    elif config['index']:
+    elif 'index' in config:
         domain = config['index']
     domain = domain.lower()
     domain = re.sub(r'(https?://|www\.|/index\.php|/api\.php)', '', domain)