Reduce call to Module::is_empty.

src/func/call.rs

@@ -1445,7 +1445,7 @@ impl Engine {
 
         // If new functions are defined within the eval string, it is an error
         #[cfg(not(feature = "no_function"))]
-        if !ast.shared_lib().is_empty() {
+        if ast.has_functions() {
             return Err(crate::PERR::WrongFnDefinition.into());
         }
 

src/func/script.rs

@@ -118,9 +118,7 @@ impl Engine {
                 .cloned()
                 .for_each(|(n, m)| global.push_import(n, m));
 
-            if !lib.is_empty() {
-                global.lib.push(lib.clone());
-            }
+            global.lib.push(lib.clone());
 
             Some(mem::replace(&mut global.constants, constants.clone()))
         } else {