Handle NULL from output_get_active_workspace

This modifies the places where output_get_active_workspace is called to
handle a NULL result. Some places already handled it and did not need a
change, some just have guard off code blocks, others return errors, and
some have sway_asserts since the case should never happen. A lot of this
is probably just safety precautions since they probably will never be
called when `output_get_active_workspace` is not fully configured with a
workspace.

1 files changed, 3 insertions, 0 deletions

diff --git a/sway/input/cursor.c b/sway/input/cursor.c
index 170532be..3236c74a 100644
--- a/sway/input/cursor.c
+++ b/sway/input/cursor.c
@@ -104,6 +104,9 @@ struct sway_node *node_at_coords(
 
         // find the focused workspace on the output for this seat
         struct sway_workspace *ws = output_get_active_workspace(output);
+        if (!ws) {
+                return NULL;
+        }
 
         if ((*surface = layer_surface_at(output,
                                 &output->layers[ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY],