fixed a parameter error

git-svn-id: svn://bind10.isc.org/svn/bind10/trunk@1079 e5f2f494-b856-4b98-b285-d166d9295462

src/lib/dns/cpp/tests/testdata/gen-wiredata.py.in

@@ -218,7 +218,7 @@ if __name__ == "__main__":
 
     outputfile = options.output
     if not outputfile:
-        m = re.match('(.*)\.[^.]+$', sys.argv[1])
+        m = re.match('(.*)\.[^.]+$', configfile)
         if m:
             outputfile = m.group(1)
         else: