Parses OkPacket message and try to find changed rows (should solve most of #251)

Exposes the key "changedRows"

Author: dresende

lib/protocol/packets/OkPacket.js

@@ -15,6 +15,12 @@ OkPacket.prototype.parse = function(parser) {
   this.serverStatus = parser.parseUnsignedNumber(2);
   this.warningCount = parser.parseUnsignedNumber(2);
   this.message      = parser.parsePacketTerminatedString();
+
+  var m = this.message.match(/\schanged:\s*(\d+)/i);
+
+  if (m !== null) {
+    this.changedRows = parseInt(m[1], 10);
+  }
 };
 
 OkPacket.prototype.write = function(writer) {