[PATCH 1/3] vbscript: Fail if we have no context in InvokeEx.

[Jacek Caban]

From: Gabriel Ivăncescu <gabrielopcode(a)gmail.com>

The current code can't cope with it, so do the same thing as in GetDispID,
to prevent a possible crash.

Signed-off-by: Gabriel Ivăncescu <gabrielopcode(a)gmail.com>
Signed-off-by: Jacek Caban <jacek(a)codeweavers.com>
---
  dlls/vbscript/vbdisp.c | 3 +++
  1 file changed, 3 insertions(+)