[PATCH] jscript: Fix `this` within IDispatchEx::InvokeEx.

[Jacek Caban]

From: Puetz Kevin A

Latent bug revealed by 614ea7e6243ead003bcfe4624895154972f3445f;
Now that cross-context calls go through disp_call* instead of
jsdisp_call*, and thus through InvokeEx, the `this` pointer is
lost when calling methods inherited from a prototype.

Signed-off-by: Kevin Puetz 
Signed-off-by: Jacek Caban 
---

Back to Kevin's version, sorry for messing this.

dlls/jscript/dispex.c    |  8 ++--
  dlls/jscript/tests/run.c | 89 +++++++++++++++++++++++++++++++++++++++-
  2 files changed, 93 insertions(+), 4 deletions(-)