More work in --silent support.

Signed-off-by: Simon Hausmann <hausmann@kde.org>

contrib/fast-import/p4-fast-export.py

@@ -42,6 +42,7 @@ for o, a in opts:
         silent= True
 
 if len(args) == 0 and len(globalPrefix) != 0:
+    if not silent:
         print "[using previously specified depot path %s]" % globalPrefix
 elif len(args) != 1:
     print "usage: %s //depot/path[@revRange]" % sys.argv[0]