wininet: Add a stub for ShowClientAuthCerts.

dlls/wininet/internet.c

@@ -4385,3 +4385,9 @@ BOOL WINAPI InternetQueryFortezzaStatus(DWORD *a, DWORD_PTR b)
     FIXME("(%p, %08lx) stub\n", a, b);
     return 0;
 }
+
+DWORD WINAPI ShowClientAuthCerts(HWND parent)
+{
+    FIXME("%p: stub\n", parent);
+    return 0;
+}

dlls/wininet/wininet.spec

@@ -234,7 +234,7 @@
 @ stdcall SetUrlCacheGroupAttributeW(int64 long long ptr ptr)
 @ stub SetUrlCacheHeaderData
 @ stub ShowCertificate
-@ stub ShowClientAuthCerts
+@ stdcall ShowClientAuthCerts(ptr)
 @ stub ShowSecurityInfo
 @ stdcall ShowX509EncodedCertificate(ptr ptr long)
 @ stdcall UnlockUrlCacheEntryFile(str long) UnlockUrlCacheEntryFileA