[pango/asan-fixes: 2/4] tests: Make test-layout work standalone

[Matthias Clasen <matthiasc src gnome org>]

commit a08172ea05b1ef3dbdfd3a35b66b802ee56a7473
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Sep 12 13:35:50 2020 -0400

    tests: Make test-layout work standalone
    
    This broke when I recently reshuffled things.

 tests/test-layout.c | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/tests/test-layout.c b/tests/test-layout.c
index 58ab46eb..2cbdc042 100644
--- a/tests/test-layout.c
+++ b/tests/test-layout.c
@@ -238,6 +238,9 @@ test_file (const gchar *filename, GString *string)
   PangoWrapMode wrap = PANGO_WRAP_WORD;
   PangoFontDescription *desc;
 
+  if (context == NULL)
+    context = pango_font_map_create_context (pango_cairo_font_map_get_default ());
+
   g_file_get_contents (filename, &contents, &length, &error);
   g_assert_no_error (error);