stubs: Fix warning caused by missing include statement Warning from the Sparse static analysis tool: stubs/qtest.c:14:6: warning: symbol 'qtest_allowed' was not declared. Should it be static? Add the missing include statement which declares qtest_allowed. Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>