Fixes initial reconnection issue with ipv4 sip providers having ipv6 dns records.

src/net/java/sip/communicator/impl/protocol/sip/ProtocolProviderServiceSipImpl.java

@@ -2097,6 +2097,10 @@ void initOutboundProxy(SipAccountID accountID, int ix)
                 throw new UnknownHostException();
 
             proxyAddress = proxySocketAddress.getAddress();
+
+            if(this.currentConnectionAddress == null)
+                this.currentConnectionAddress = proxySocketAddress;
+
             proxyPort = proxySocketAddress.getPort();
 
             if (logger.isTraceEnabled())