PATCH: ITypeInfo::Invoke stack overwrite fix

[Marcus Meissner]

Hi,

This patch fixes part of bug 3529. The code was overwriting the 
"void*" space with a full VARIANT (vt was VT_VARIANT | VT_BYREF).

So we reserve a full VARIANT now. Make it completely empty
to get zeroed integers inside too.

Ciao, Marcus

Changelog:
	Have enough stack space up to even VT_VARIANTs,
	fixes a stack corruption.

Index: dlls/oleaut32/typelib.c
===================================================================
RCS file: /home/wine/wine/dlls/oleaut32/typelib.c,v
retrieving revision 1.205
diff -u -r1.205 typelib.c
--- dlls/oleaut32/typelib.c	6 Jan 2006 20:52:34 -0000	1.205
+++ dlls/oleaut32/typelib.c	11 Jan 2006 05:56:45 -0000
@@ -5205,7 +5232,7 @@
             VARIANT varresult;
             SHORT missing_param_offset = func_desc->cParams;
             SHORT missing_params = 0;
-            void *retval; /* pointer for storing byref retvals in */
+            VARIANT retval; /* pointer for storing byref retvals in */
 
             hres = S_OK;
             for (i = 0; i < func_desc->cParams; i++)
@@ -5238,7 +5265,7 @@
                         arg = prgpvarg[i] = &rgvarg[i];
                         memset(arg, 0, sizeof(*arg));
                         V_VT(arg) = rgvt[i];
-                        retval = NULL;
+                        memset(&retval, 0, sizeof(retval));
                         V_BYREF(arg) = &retval;
                     }
                     else