fix compiler warning on linux

diff --git a/vm/code_blocks.hpp b/vm/code_blocks.hpp
index 8aa8b5693fa0be90924af00cade8fad9c4c1d5e9..075fe389b4cea78ea9099b064e1bfe6461dd7d28 100644 (file)
--- a/vm/code_blocks.hpp
+++ b/vm/code_blocks.hpp
@@ -11,7 +11,7 @@ struct code_block
 
        bool free_p() const
        {
-               return header & 1 == 1;
+               return (header & 1) == 1;
        }
 
        code_block_type type() const