spoolss: Added RevertToPrinterSelf stub implementation.

dlls/spoolss/spoolss.spec

@@ -101,7 +101,7 @@
 @ stub ReplyOpenPrinter
 @ stub ReplyPrinterChangeNotification
 @ stub ResetPrinterW
-@ stub RevertToPrinterSelf
+@ stdcall RevertToPrinterSelf()
 @ stub RouterAllocPrinterNotifyInfo
 @ stub RouterFindFirstPrinterChangeNotification
 @ stub RouterFindNextPrinterChangeNotification

dlls/spoolss/spoolss_main.c

@@ -142,3 +142,9 @@ BOOL WINAPI DllFreeSplStr(LPWSTR pwstr)
     TRACE("(%s) PTR: %p\n", debugstr_w(pwstr), pwstr);
     return HeapFree(GetProcessHeap(), 0, pwstr);
 }
+
+HANDLE WINAPI RevertToPrinterSelf(void)
+{
+    FIXME("() stub\n");
+    return NULL;
+}