Testsuite fixes

[marcjansen]

In Chrome 17.x two tests fail due to mixed precision when compairing numerical values.
In Firefox 10.0.1 additionally an OverviewMap test and a Format.XML test fails.

[elemoine]

@marcjansen you're the kind, I'll take a look.

[fredj]

see also #161 and #162

[marcjansen]

As of 67ea250 there are still 6 tests failing in Firefox 10.0.1 on Linux:

• Layer/GeoRSS.html: fail 3 ok 8 (detailed: fail 1 ok 23)
  • test_Layer_GeoRSS_AtomParsing planned 6 assertions but got 3; fail 1 ok 2
  • test_Layer_GeoRSS_popups planned 4 assertions but got 0; fail 0 ok 0
  • test_Layer_GeoRSS_resizedPopups planned 4 assertions but got 0; fail 0 ok 0
• Layer/Text.html: fail 2 ok 6 (detailed: fail 0 ok 31)
  • test_Layer_Text_overflow planned 4 assertions but got 0; fail 0 ok 0
  • test_Layer_Text_events_nopopups planned 4 assertions but got 0; fail 0 ok 0
• Map.html: fail 1 ok 55 (detailed: fail 1 ok 313)
  • test_panTo fail 1 ok 5
• Tween.html: fail 1 ok 2 (detailed: fail 3 ok 7)
  • test_Tween_start fail 3 ok 2
• deprecated/Layer/MapServer.html: fail 1 ok 0 (detailed: fail 2 ok 3)
  • test_Layer_MapServer_Reproject fail 2 ok 3
• deprecated/Layer/WMS.html: fail 1 ok 0 (detailed: fail 2 ok 3)
  • test_Layer_WMS_Reproject fail 2 ok 3

Chrome 17 runs the complete suite without errors.

[elemoine]

I can confirm that the Control.OverwiewMap, Format.WKT and Strategy.BBOX tests now pass in FF 10, Chrome, and IE 8. Thanks a lot for fixing that @marcjansen. Please merge.

FYI, we have more failing tests, see #249. I'd happily use some help to make all tests pass again.