Use pyrex to regenerate .c files

--- Soya-0.14/setup.py~	2008-08-29 13:17:36.000000000 +0200
+++ Soya-0.14/setup.py	2008-09-01 20:45:59.000000000 +0200
@@ -85,10 +85,6 @@
 except:
 	HAVE_PYREX = 0
 
-# Only enable Pyrex compilation for SVN sources
-if not os.path.exists(os.path.join(os.path.dirname(__file__), ".svn")):
-	HAVE_PYREX = 0
-
 if HAVE_PYREX: print "Pyrex compilation enabled!"
 else:          print "Pyrex compilation disabled."
 	
