Update tests

Author: lucic71

tests/unit/out/unsafe/strchr_c.rs

@@ -12,7 +12,7 @@ pub fn main() {
     }
 }
 unsafe fn main_0() -> i32 {
-    let mut s: *const u8 = (b"hello world\0".as_ptr().cast_mut()).cast_const();
+    let mut s: *const u8 = b"hello world\0".as_ptr().cast_mut().cast_const();
     let mut r: *mut u8 = libc::strchr(s as *const i8, ('w' as i32)) as *mut u8;
     assert!((((!((r).is_null())) as i32) != 0));
     assert!((((((*r) as i32) == ('w' as i32)) as i32) != 0));