Added a check for not calling next() before getting objects from the result set,

moved the check for columnIndex into same call
check at the top of all getXXX
added appropriate error

src/interfaces/jdbc/org/postgresql/ResultSet.java

@@ -255,5 +255,10 @@ public abstract class ResultSet
 	    else
 		this.warnings = warnings;
 	}
+	protected void checkResultSet( int column ) throws SQLException
+	{
+		if ( this_row == null ) throw new PSQLException("postgresql.res.nextrequired");
+		if ( column < 1 || column > fields.length ) throw new PSQLException("postgresql.res.colrange" );
+	}
 }