Some work on script function parameters.

src/dynamic_data/script_handling/mod.rs

@@ -180,9 +180,9 @@ mod tests {
             0
         }
 
-        fn add_suppression(&self) {}
+        fn add_suppression(&mut self) {}
 
-        fn remove_suppression(&self) {}
+        fn remove_suppression(&mut self) {}
 
         fn on_initialize(&mut self, _pars: &[EffectParameter]) {
             self.test_count += 1;