Fixed <rdar://problem/3972905> CrashTracer: ...36 crashes at com.apple.WebCore:...

	Fixed <rdar://problem/3972905> CrashTracer: ...36 crashes at com.apple.WebCore: khtml::CSSStyleSelector::applyDeclarations + 120

	Revert to old (and correct) behavior of returning runtime object
	when passed as a parameter, rather than it's corresponding DOM
	object.

        Reviewed by Chris.

        * bindings/objc/WebScriptObject.mm:
        (+[WebScriptObject _convertValueToObjcValue:KJS::originExecutionContext:Bindings::executionContext:Bindings::]):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@8519 268f45cc-cd09-0410-ab3c-d52691b4dbfc