BUG#15981 Current 5.1 fails for NDB tests

sql/ha_ndbcluster.cc:
  Add part that where lost when merging from 5.0 to 5.1

sql/ha_ndbcluster.cc

@@ -3014,6 +3014,26 @@ void ha_ndbcluster::position(const byte *record)
         }      
         *buff++= 0;
       }
+
+      size_t len = key_part->length;
+      const byte * ptr = record + key_part->offset;
+      Field *field = key_part->field;
+      if ((field->type() ==  MYSQL_TYPE_VARCHAR) &&
+	  ((Field_varstring*)field)->length_bytes == 1)
+      {
+	/** 
+	 * Keys always use 2 bytes length
+	 */
+	buff[0] = ptr[0];
+	buff[1] = 0;
+	memcpy(buff+2, ptr + 1, len);	
+	len += 2;
+      }
+      else
+      {
+	memcpy(buff, ptr, len);
+      }
+      buff += len;
     }
   } 
   else