winedos: Make sure that the main message queue exists before the DOS thread starts.

dlls/winedos/module.c

@@ -655,6 +655,7 @@ static void MZ_Launch( LPCSTR cmdtail, int length )
   BYTE *psp_start = PTR_REAL_TO_LIN( DOSVM_psp, 0 );
   DWORD rv;
   SYSLEVEL *lock;
+  MSG msg;
 
   MZ_FillPSP(psp_start, cmdtail, length);
   pTask->flags |= TDBF_WINOLDAP;
@@ -665,6 +666,9 @@ static void MZ_Launch( LPCSTR cmdtail, int length )
   GetpWin16Lock( &lock );
   _LeaveSysLevel( lock );
 
+  /* force the message queue to be created */
+  PeekMessageW(&msg, NULL, WM_USER, WM_USER, PM_NOREMOVE);
+
   ResumeThread(dosvm_thread);
   rv = DOSVM_Loop(dosvm_thread);