Allow using constant as size argument to data.fill

.github/workflows/fox32asm-unstable-linux.yml

@@ -2,8 +2,7 @@ on:
   workflow_dispatch:
   push:
     branches:
-      - main
+      - '*'
-      - github-actions
 
 name: fox32asm Unstable - Linux
 

src/main.rs

@@ -695,6 +695,8 @@ fn parse_data(pair: pest::iterators::Pair<Rule>) -> AstNode {
                 let ast = parse_operand(pair.into_inner().nth(1).unwrap(), false);
                 if let AstNode::Immediate32(word) = ast {
                     word
+                } else if let AstNode::Constant {name: _, address} = ast {
+                    address
                 } else {
                     unreachable!()
                 }