Crash when fitBounds() to a zero-area bounds on uninitialized map

How to reproduce

• Leaflet version I’m using: 1.0.2
• Browser (with version) I’m using: Chrome
• OS/Platform (with version) I’m using: OS

What behaviour I’m expecting and which behaviour I’m seeing

I discovered a bug when running the method fitBounds and use same bounds. After running i get the message: Uncaught Error: Invalid LatLng object: (NaN, NaN).

The problem occur in method getBoundsZoom in var scale = Math.min(size.x / boundsSize.x, size.y / boundsSize.y);. This return Infinity and cause the error

Minimal example reproducing the issue

    var map = L.map('map', {zoom: 15});
    map.fitBounds([[42.897968, -83.25632], [42.897968, -83.25632]]);

Stack trace looks like:

Error: Invalid LatLng object: (NaN, NaN)  leaflet-src.js:1609:9
	L.LatLng https://unpkg.com/leaflet@1.0.0/dist/leaflet-src.js:1609:9
	L.Projection.SphericalMercator.unproject https://unpkg.com/leaflet@1.0.0/dist/leaflet-src.js:2019:10
	L.CRS.pointToLatLng https://unpkg.com/leaflet@1.0.0/dist/leaflet-src.js:2062:10
	L.Map<.unproject https://unpkg.com/leaflet@1.0.0/dist/leaflet-src.js:2877:10
	L.Map<._getBoundsCenterZoom https://unpkg.com/leaflet@1.0.0/dist/leaflet-src.js:2451:16
	L.Map<.fitBounds https://unpkg.com/leaflet@1.0.0/dist/leaflet-src.js:2470:16

https://jsfiddle.net/emirdeliz/27a1hrvy/

[emirdeliz]

Really, this fixed the problem after set maxZoom=15. Thanks

[IvanSanchez]

So with #5157, the call to _getBoundsCenterZoom will return the proper center and a zoom of Infinity, and together with #4916 everything works for this edge case.