Minor protocol fixes for Thin mode

Author: sharadraju

lib/thin/protocol/buffer.js

@@ -987,7 +987,7 @@ class BaseBuffer {
   writeUInt64BE(n) {
     const buf = this.reserveBytes(8);
     buf.writeUInt32BE(0);
-    buf.writeUInt32BE(n);
+    buf.writeUInt32BE(n, 4);
   }
 
   //---------------------------------------------------------------------------

lib/thin/protocol/messages/dataType.js

@@ -38,7 +38,16 @@ const Message = require("./base.js");
  */
 class DataTypeMessage extends Message {
 
-  decode() { }
+  processMessage(buf) {
+    while (true) {        // eslint-disable-line
+      const dataType = buf.readUInt16BE();
+      if (dataType === 0)
+        break;
+      const convDataType = buf.readUInt16BE();
+      if (convDataType !== 0)
+        buf.skipBytes(4);
+    }
+  }
 
   encode(buf) {
     buf.writeUInt8(constants.TNS_MSG_TYPE_DATA_TYPES);