Fix error message for missing gas

starkware-libs/cairo#3738

Author: mkaput

extensions/scarb-cairo-run/src/main.rs

@@ -62,7 +62,7 @@ fn main() -> Result<()> {
         .with_context(|| format!("failed to parse sierra program: {path}"))?;
 
     if args.available_gas.is_none()
-        && sierra_program.type_declarations.iter().any(|decl| {
+        && sierra_program.libfunc_declarations.iter().any(|decl| {
             matches!(
                 decl.long_id.generic_id.0.as_str(),
                 WithdrawGasLibfunc::STR_ID