Refactors to check assert using macro parameter

Author: 1nF0rmed

lightning/src/ln/functional_test_utils.rs

@@ -785,10 +785,7 @@ macro_rules! check_closed_event {
 				_ => panic!("Unexpected event"),
 			}
 		}
-
-		if $is_check_discard_funding {
-			assert!(issues_discard_funding);
-		}
+		assert_eq!($is_check_discard_funding, issues_discard_funding);
 	}}
 }