Fix one erroneous equals sign and add some missing BAD_CAST to xml.c
Fix one erroneous equals sign and add some missing BAD_CAST to xml.c

JoaoRodrigues/freesasa,mittinatten/freesasa,JoaoRodrigues/freesasa,mittinatten/freesasa,JoaoRodrigues/freesasa,mittinatten/freesasa,JoaoRodrigues/freesasa,mittinatten/freesasa