lib/ipaddr.rb (initialize): rescue StandardError.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@5210 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/ipaddr.rb

@@ -418,7 +418,7 @@ class IPAddr
     #		       Socket::AI_NUMERICHOST)
     begin
       IPSocket.getaddress(prefix)		# test if address is vaild
-    rescue ArgumentError
+    rescue
       raise ArgumentError, "invalid address"
     end
     @addr = @family = nil