style: Add void to function without arguments

After run `make CC=clang` we found the following problems:

    error: a function declaration without a prototype is deprecated in all versions of C [-Werror,-Wstrict-prototypes]

Signed-off-by: Johnny Richard <johnny@johnnyrichard.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/scope.h b/src/scope.h
index bce3567..c221703 100644
--- a/src/scope.h
+++ b/src/scope.h
@@ -30,7 +30,7 @@ typedef struct scope_item_t
 } scope_item_t;
 
 scope_t *
-scope_new();
+scope_new(void);
 
 void
 scope_destroy(scope_t *scope);