Signal binding behavior - error when inside if.bind

[dev-zb]

When an element containing a binding with a signal is removed from and/or readd to a view (using an if.bind or similar) an error is thrown:

• Remove: ReferenceError: signals is not defined
• Readd: Error: A binding behavior named "signal" has already been applied to ...

Seems to be fixed by changing

let bindings = signals[name];

to

let bindings = this.signals[name];

on this line https://github.com/aurelia/templating-resources/blob/master/src/signal-binding-behavior.js#L27

[jdanyow]

thanks @zebrooks !