circuit handles load commands better

Signed-off-by: Ava Hahn <ava@sunnypup.io>

src/stl/control.rs

@@ -314,10 +314,14 @@ pub fn circuit_callback(ast: &Seg, syms: &mut SymTable) -> Result<Ctr, String> {
                 Ctr::Seg(s) if expand_eval_res => {
                     if let Ctr::Bool(b) = *s.car {
                         return b;
+                    } else if let Ctr::Integer(i) = *s.car {
+                        return i==0;
                     } else {
                         error = "impossible condition in circuit form".to_string();
                     }
-                }
+                },
+
+                Ctr::Integer(i) => return i == 0,
 
                 _ => error = format!("{cursor} form did not evaluate to a boolean"),
             },