Partial port of r59682 from py3k.
On Windows, when import fails to load a dll module, the message says
"error code 193" instead of a more informative text.
It turns out that FormatMessage needs additional parameters for some error codes.
For example: 193 means "%1 is not a valid Win32 application".
Since it is impossible to know which parameter to pass, we use
FORMAT_MESSAGE_IGNORE_INSERTS to get the raw message, which is still better
than the number.
diff --git a/Python/dynload_win.c b/Python/dynload_win.c
index fc641b9..98ebccb 100644
--- a/Python/dynload_win.c
+++ b/Python/dynload_win.c
@@ -194,7 +194,8 @@
errorCode = GetLastError();
theLength = FormatMessage(
- FORMAT_MESSAGE_FROM_SYSTEM, /* flags */
+ FORMAT_MESSAGE_FROM_SYSTEM |
+ FORMAT_MESSAGE_IGNORE_INSERTS, /* flags */
NULL, /* message source */
errorCode, /* the message (error) ID */
0, /* default language environment */