xwayland: handle size_hints == NULL

In case xcb-iccm is not installed on the system, size_hints will be
null. Handle this as if the get_constraints functions was not
implemented and return the defaults.

Fixes #4870

1 files changed, 9 insertions, 0 deletions

diff --git a/sway/desktop/xwayland.c b/sway/desktop/xwayland.c
index 845d158d..e99fe06a 100644
--- a/sway/desktop/xwayland.c
+++ b/sway/desktop/xwayland.c
@@ -298,6 +298,15 @@ static void get_constraints(struct sway_view *view, double *min_width,
                 double *max_width, double *min_height, double *max_height) {
         struct wlr_xwayland_surface *surface = view->wlr_xwayland_surface;
         struct wlr_xwayland_surface_size_hints *size_hints = surface->size_hints;
+
+        if (size_hints == NULL) {
+                *min_width = DBL_MIN;
+                *max_width = DBL_MAX;
+                *min_height = DBL_MIN;
+                *max_height = DBL_MAX;
+                return;
+        }
+
         *min_width = size_hints->min_width > 0 ? size_hints->min_width : DBL_MIN;
         *max_width = size_hints->max_width > 0 ? size_hints->max_width : DBL_MAX;
         *min_height = size_hints->min_height > 0 ? size_hints->min_height : DBL_MIN;