fix(init): properly handle null geometry

src/application.c

@@ -510,6 +510,11 @@ static bool load_layout(struct swappy_state *state) {
 static bool init_gtk_window(struct swappy_state *state) {
   g_info("activating application ----------");
 
+  if (!state->geometry) {
+    g_critical("no geometry found, did you use -f or -g option?");
+    return false;
+  }
+
   if (!load_layout(state)) {
     return false;
   }