Fix run-pass tests to have 'pub fn main'

This is required by the check-fast target because each test is slurped up into a
submodule.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/test/run-pass/deriving-zero.rs b/src/test/run-pass/deriving-zero.rs
index fb4ffb2c3c1..59acc353fed 100644
--- a/src/test/run-pass/deriving-zero.rs
+++ b/src/test/run-pass/deriving-zero.rs
@@ -33,7 +33,7 @@ struct Lots {
     j: (),
 }
 
-fn main() {
+pub fn main() {
     let lots: Lots = Zero::zero();
     assert!(lots.is_zero());
 }