Fix bug where global names could only be used once in the root scope

Global names previously would only load once, and then not again because
of issues with how the root scope is compiled. This is fixed.

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

src/compile/mod.rs

@@ -104,6 +104,10 @@ impl Compile {
     pub(crate) fn collect_locals(&mut self, body: &Body) {
         locals::CollectLocals::new(self).collect(body);
     }
+
+    pub(crate) fn scope(&self) -> &Scope {
+        &self.scope
+    }
 }
 
 /// Constant data pool used for building the const pool.