Taskbar11: Fixed a bug that could crash `explorer.exe` when right clicking certain system tray icons on 22621-based builds

Impact: Failure to check against a NULL value and dereferencing it
leads to a crash in `explorer.exe` with fault offset 0xfc69 on
22621-based OS builds. This happens when right clicking certain system
tray icons, like "Epic Games Launcher" when using the Windows 11
taskbar.

Description: The issue has been addressed with improved checks: a check
against NULL values is performed before attempting to work with the
data the variables might point to.

ExplorerPatcher/dllmain.c

@@ -2235,7 +2235,7 @@ BOOL IsPointOnEmptyAreaOfNewTaskbar(POINT pt)
     }
     if (SUCCEEDED(hr) && bIsWindows11Version22H2OrHigher)
     {
-        bRet = (!wcscmp(elemName, L"") && !wcscmp(elemType, L"Taskbar.TaskbarFrameAutomationPeer"));
+        bRet = elemName && elemType && (!wcscmp(elemName, L"") && !wcscmp(elemType, L"Taskbar.TaskbarFrameAutomationPeer"));
     }
     if (SUCCEEDED(hr) && !bIsWindows11Version22H2OrHigher)
     {