[giow] (3) Fix a accidental (?) change in r7614 that undefined <img width> and <img height>; not sure what I was doing there.
Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=24327
Affected topics: DOM APIs, HTML, Rendering

git-svn-id: http://svn.whatwg.org/webapps@8410 340c8d12-0b0e-0410-8428-c7bf67bfef74
[giow] (3) Allow browsers to entirely ignored arguments to captureEvents() and releaseEvents(), rather than requiring at least one
Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=24324
Affected topics: HTML

git-svn-id: http://svn.whatwg.org/webapps@8411 340c8d12-0b0e-0410-8428-c7bf67bfef74