Addressed copilot's review points

Author: danielinux

src/dohd.c

@@ -304,6 +304,7 @@ static void dohd_destroy_client(struct client_data *cd)
     }
     if (!found) {
         dohprint(DOH_ERR, "Unexpected client_data ptr %p not in Clients list\n", cd);
+        return;
     }
 
     /* Cleanup pending requests */

src/libevquick.c

@@ -375,7 +375,7 @@ void evquick_deltimer(evquick_timer *t)
     if (heap_delete(ctx->timers, t->id) == 0)
         free(t);
 #else
-    if (!ctx || !t)
+    if (!t)
         return;
     if (heap_delete(ctx->timers, t->id) == 0)
         free(t);