Cannot zoom out with scroll wheel when native zoom is enabled

[SammysHP]

What steps will reproduce the problem?

1. Open a background layer and enable native zoom (e.g. Bing)
2. Try to zoom out with the scroll wheel

What is the expected result?

JOSM zooms out.

What happens instead?

Instead of zooming out the view just moves a bit (depending on the cursor position). Zooming in works fine. Also using the zoom slider works without issues.

Please provide any additional information below. Attach a screenshot if possible.

Zoom steps is set to 2 (zoom.ratio=1.4142135623730951)

URL:http://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2016-06-23 02:35:10 +0200 (Thu, 23 Jun 2016)
Build-Date:2016-06-23 01:34:05
Revision:10463
Relative:URL: ^/trunk

Identification: JOSM/1.5 (10463 de) Linux Arch Linux
Memory Usage: 678 MB / 1365 MB (401 MB allocated, but free)
Java version: 1.8.0_92-b14, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
VM arguments: [-Djosm.restart=true, -Dawt.useSystemAAFontSettings=on, -Dswing.aatext=true, -Dswing.defaultlaf=com.sun.java.swing.plaf.gtk.GTKLookAndFeel]
Dataset consistency test: No problems found

Plugins:
- DirectUpload (32158)
- OpeningHoursEditor (32158)
- PicLayer (32158)
- buildings_tools (32158)
- contourmerge (1014)
- measurement (32324)
- print (32191)
- reltoolbox (32158)
- reverter (32158)
- tageditor (32158)
- terracer (32158)
- turnlanes (32158)
- utilsplugin2 (32158)

Map paint styles:
- https://github.com/bastik/mapcss-tools/raw/osm/mapnik2mapcss/osm-results/mapnik.zip
- https://github.com/simon04/coloured-addresses.mapcss/raw/master/dist/coloured-addresses.mapcss
- https://josm.openstreetmap.de/josmfile?page=Styles/Coloured_Streets&style&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Lane_and_Road_Attributes&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Lane_features&style&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Lane_features_ryg&style&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/LessObtrusiveNodes&style&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/LitObjects&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Modified&style&zip=1

Last errors/warnings:
- W: java.io.IOException: Attribution is not loaded yet
- W: java.io.IOException: Attribution is not loaded yet
- W: java.io.IOException: Attribution is not loaded yet
- W: java.io.IOException: Attribution is not loaded yet
- W: java.io.IOException: Attribution is not loaded yet

[scai]

Same problem here after adding the Bing layer with josm-latest (10463) on OpenJDK 8.

[wiktorn]

In 10466/josm:

Get intermediate steps when needed.

Closes: #13035

[wiktorn]

Actually, this was bug hidden by the bug and Michael removed one (in zoomTo), exposing the other.