Fix occassionally failing FormatMessage call

Call FormatMessage with the IGNORE_INSERTS flag. Without the flag,
the FormatMessage() call will fail when the error message contains
inserts (such as %1), as we are not providing any arguments.

Various Windows system error messages contain inserts; e.g. error 193.

See also: https://devblogs.microsoft.com/oldnewthing/20071128-00/?p=24353

src/common/log.cpp

@@ -1066,7 +1066,8 @@ static const wxChar* GetSysErrorMsg(wxChar* szBuf, size_t sizeBuf, unsigned long
     LPVOID lpMsgBuf;
     if ( ::FormatMessage
          (
-            FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
+            FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
+            FORMAT_MESSAGE_IGNORE_INSERTS,
             NULL,
             nErrCode,
             MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),