build: Define x11 to an empty dependency if X11 autolaunch is disabled

Otherwise, we can't build successfully for Windows with X11 autolaunch
explicitly disabled.

Signed-off-by: Simon McVittie <smcv@collabora.com>

diff --git a/meson.build b/meson.build
index 4c3690a2264a23df839ef84dbaf0ab21b1693fa4..937f64381982c905630496158e10a1aeb7732dc3 100644 (file)
--- a/meson.build
+++ b/meson.build
@@ -501,6 +501,7 @@ endif
 
 if get_option('x11_autolaunch').disabled()
     use_x11_autolaunch = false
+    x11 = not_found
 else
     if get_option('x11_autolaunch').enabled() and platform_windows
         error('X11 autolaunch is not supported on Windows')