error message might be wrong in the TestDb.java

[Ray-Luo]

In the TestDb.java Line 70
` // verify that the tables have been created
do {
tableNameHashSet.remove(c.getString(0));
} while( c.moveToNext() );

    // if this fails, it means that your database doesn't contain both the location entry
    // and weather entry tables
    assertTrue("Error: Your database was created without both the location entry and weather entry tables",
            tableNameHashSet.isEmpty());`

I was wondering if there was only one table in the database, then the assertTrue would still fail. In that case the error message "both tables are not created" might not be informative, and this----"Error: Your database was created without the location entry table or the weather entry table or both" would be better.