[gdm] meson: Really don't require libcheck

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 72939240d47c390305676cd325ae13fba0929275
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Fri May 1 10:57:16 2020 -0500

    meson: Really don't require libcheck
    
    This fixes bf4aa1be9f493632e3dbcd6ae56a2cc97ea6d29a

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index b0f46e5b..261b3a02 100644
--- a/meson.build
+++ b/meson.build
@@ -109,7 +109,7 @@ have_adt = cc.has_header_symbol('bsm/adt.h', 'ADT_USER')
 # libaudit
 libaudit_dep = dependency('audit', required: get_option('libaudit'))
 # unit testsheadername
-libcheck_dep = dependency('check', version: '>= 0.9.4')
+libcheck_dep = dependency('check', required: false, version: '>= 0.9.4')
 
 cc.has_header('security/pam_modutil.h')
 cc.has_header('security/pam_ext.h')