fix import error

src/common/gajim.py

@@ -139,12 +139,13 @@ for status in ('online', 'chat', 'away', 'xa', 'dnd', 'invisible'):
 HAVE_PYCRYPTO = True
 try:
 	from Crypto.PublicKey.RSA import generate
+	import os
 except ImportError:
 	HAVE_PYCRYPTO = False
 else:
 	# public key for XEP-0116
 	#FIXME os.urandom is not a cryptographic PRNG
-	pubkey = Crypto.PublicKey.RSA.generate(384, os.urandom)
+	pubkey = generate(384, os.urandom)
 
 def get_nick_from_jid(jid):
 	pos = jid.find('@')