Fix name and null management

Author: citronneur

src/error.rs

@@ -7,7 +7,7 @@ pub enum MinusOneErrorKind {
     InvalidParent,
     InvalidProgram,
     InvalidProgramIndex,
-    NestedTranscations,
+    NestedTransactions,
     Unknown,
 }
 
@@ -88,7 +88,7 @@ impl Error {
 
     pub fn nested_transactions() -> Self {
         Error::MinusOneError(MinusOneError::new(
-            MinusOneErrorKind::NestedTranscations,
+            MinusOneErrorKind::NestedTransactions,
             "Cannot start transaction: transaction already started",
         ))
     }

src/ps/cast.rs

@@ -134,7 +134,7 @@ impl<'a> RuleMut<'a> for Cast {
                         (Some(Type(t)), Some(Raw(Bool(v)))) => if t == "bool" {
                             node.set(Raw(Bool(*v)));
                         },
-                        (Some(Type(t)), Some(Powershell::DeadCode)) => if t == "bool" {
+                        (Some(Type(t)), Some(Powershell::Null)) => if t == "bool" {
                             node.set(Raw(Bool(false)));
                         },
                         (Some(Type(t)), Some(Powershell::HashMap(_))) => if t == "bool" {