Classic poll: Don't submit choices form if form is not completed

js/app/classic_poll.js

@@ -28,11 +28,21 @@
         });
         if (nb_filled_choices >= 1) {
             $('button[name="fin_sondage_autre"]').removeClass('disabled');
+            return true;
         } else {
             $('button[name="fin_sondage_autre"]').addClass('disabled');
+            return false;
         }
     };
 
+    // Handle form submission
+    $(document.formulaire).on('submit', function (e) {
+        if (!submitChoicesAvalaible()) {
+            e.preventDefault();
+            e.stopPropagation();
+        }
+    });
+
     // Button "Add a choice"
 
     $('#add-a-choice').on('click', function () {