Check that the given tables exist
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 Syntax

        H_CheckTables( aTables )

 Arguments:

      aTables - Array of tables and indexes

 Returns:

      NIL

 Description:

      Checks that each of the given tables and indexes exists in the
      default TABLES directory.

      Structure of aTables is { Element 1 , Element 2 , ... }

      where each element is { Table name , Index 1 , Index 2 , ... }

 Examples:



 Header File: H_LIB52.CH

 Source: CHEKTABS.PRG

 Author:  Martin Colloby