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: 5459	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5459/f5797aeb2410e2259028142b87595fe71f03e531/tostring-2.js/buggy/js/tests/js1_2/function/tostring-2.js