rem: if ( a != null && a != void 0 ) return a; else return 0; 
add: if ( a != null && a != void 0 ) return a; else return 0; 
context: function TestAnd( a ) {    if ( a != null && a != void 0 )	return a;    else	return 0;}
meta: 10520	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/10520/0b675418ba636127763e94e614e62364d6caa659/tostring-2.js/buggy/js/tests/js1_2/function/tostring-2.js