fixed observable

tsc.js

            function emitMemberFunctions(node) {
                ts.forEach(node.members, function (member) {
                    if (member.kind === 126){
                        writeLine();
                        emitStart(member);
                        var memberName = member.name.text;
                        var owner = node.name.text;
                        var ownerName = node.name.text;
                        if (!(member.flags & 128 /* Static */)) {
                            owner = 'this';
                        }
                        write("var getter = function(){return __observableGet("+owner+"."+memberName+"_, "+owner+", '"+memberName+"', "+member.symbol.id+")};");
                        writeLine();
                        write("getter.displayName = '"+ownerName+"."+memberName+".get';");
                        writeLine();
                        write("var setter = function(value){"+owner+"."+memberName+"_ = __observableSet("+owner+"."+memberName+"_, "+owner+", '"+memberName+"', "+member.symbol.id+", value)};");
                        writeLine();
                        write("setter.displayName = '"+ownerName+"."+memberName+".set';");
                        writeLine();
                        write("Object.defineProperty(");
                        emitStart(member.name);
                        emitNode(node.name);
                        if (!(member.flags & 128 /* Static */)) {
                            write(".prototype");
                        }
                        write(", ");
                        emitExpressionForPropertyName(member.name);
                        emitEnd(member.name);
                        write(", {");
                        increaseIndent();
                        writeLine();
                        write("get: getter,");
                        writeLine();
                        write("set: setter,");
                        writeLine();
                        write("enumerable: true,");
                        writeLine();
                        write("configurable: true");
                        decreaseIndent();
                        writeLine();
                        write("});");
                        emitEnd(member);
                    }
                    if (member.kind === 128 /* MethodDeclaration */ || node.kind === 127 /* MethodSignature */) {