[glib: 1/2] tests: Fix compilation when GLIB_DISABLE_DEPRECATION_WARNINGS is defined

[Emmanuele Bassi <ebassi src gnome org>]

commit 84940a56fda60900e8724e4193c18396b44acb23
Author: Philip Withnall <pwithnall endlessos org>
Date:   Tue Mar 22 10:15:40 2022 +0000

    tests: Fix compilation when GLIB_DISABLE_DEPRECATION_WARNINGS is defined
    
    This should fix the Coverity build, which runs with
    `-DGLIB_DISABLE_DEPRECATION_WARNINGS` defined in the environment (see
    `.gitlab-ci.yml`).
    
    See: https://gitlab.gnome.org/GNOME/glib/-/jobs/1907625
    Signed-off-by: Philip Withnall <pwithnall endlessos org>

 glib/tests/relation.c | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/glib/tests/relation.c b/glib/tests/relation.c
index f96890b2bd..8caf4573a2 100644
--- a/glib/tests/relation.c
+++ b/glib/tests/relation.c
@@ -22,7 +22,10 @@
  * GLib at ftp://ftp.gtk.org/pub/gtk/.
  */
 
+/* we know we are deprecated here, no need for warnings */
+#ifndef GLIB_DISABLE_DEPRECATION_WARNINGS
 #define GLIB_DISABLE_DEPRECATION_WARNINGS
+#endif
 
 #include <glib.h>