FIX: PHP MSSQL odbc_num_rows() returns -1

Running MSSQL with PHP  on Windows sometimes returns -1 for the function odbc_num_rows() even when there are rows in the result. This function fixes the problem:

 function best_odbc_num_rows($result,$currentRow=0)  {
   $numRecords = 0;
  odbc_fetch_row($result, 0);
  while (odbc_fetch_row($result))
  {
    $numRecords++;
  }
  odbc_fetch_row($result, $currentRow);
  return $numRecords;
}