#16 Access check issue with a Global_Alloc_Ptr in Get_Clipboard_Text_* in GWindows.Clipboard

[Gautier de Montmollin]

Built with any GNAT version so far after GNAT CE 2021:

.\gwindows\test\test_clipboard.exe

raised CONSTRAINT_ERROR : gwindows-clipboard.adb:386 access check failed
[C:\Ada\gnavi\gwindows\test\test_clipboard.exe]
0x7ff7679437ac Adainit at gwindows-clipboard.adb:386
0x7ff767921ba9 Test_Clipboard at test_clipboard.adb:34

More details here:
https://github.com/zertovitch/gwindows/issues/26