Fixed patch crash on removed objects

[benweet]

The patch method crashes when trying to patch nested object that has been removed from the target.

> var diff = jsondiffpatch.diff({abc:{value:1}},{abc:{value:2}}) undefined > jsondiffpatch.patch({}, diff) TypeError: Cannot read property 'value' of undefined at nestedPatchFilter (jsondiffpatch/build/bundle.js:793:46) at Pipe.process (jsondiffpatch/build/bundle.js:1080:9) at Processor.process (jsondiffpatch/build/bundle.js:1219:12) at DiffPatcher.patch (jsondiffpatch/build/bundle.js:208:27) at repl:1:16 at REPLServer.self.eval (repl.js:110:21) at Interface.<anonymous> (repl.js:239:12) at Interface.EventEmitter.emit (events.js:95:17) at Interface._onLine (readline.js:202:10) at Interface._line (readline.js:531:8) 

[benjamine]

Thanks, I understand this request, but I don't want last-wins to be the default, I want any conflict to raise an error (although I'm aware implementation for this might be incomplete in some cases),
Later I plan to add support for conflict resolution strategies to be plugged in, where last-wins would ideally be a builtin example, but it's a strategy that's not suitable for all scenarios.