QmlJSObserver: Fix crash when adding an element to some .qml files

Make sure that the 'artifical' URL of the item created actually is
absolute (starts with a file:///). Otherwise an Assert will be hit
when the imports include e.g. a .js file, and the Engine tries to
load it.

Task-number: QTCREATORBUG-2644
Reviewed-by: Olivier Goffart

src/plugins/qmljsinspector/qmljsclientproxy.cpp

@@ -410,7 +410,7 @@ void ClientProxy::buildDebugIdHashRecursive(const QDeclarativeDebugObjectReferen
     int rev = 0;
 
     // handle the case where the url contains the revision number encoded. (for object created by the debugger)
-    static QRegExp rx("^(.*)_(\\d+):(\\d+)$");
+    static QRegExp rx("^file://(.*)_(\\d+):(\\d+)$");
     if (rx.exactMatch(filename)) {
         filename = rx.cap(1);
         rev = rx.cap(2).toInt();