[zlib] Fix "left shift of negative value -1" error detected by ubsan
@@ -156,7 +156,7 @@ struct static_tree_desc_s {int dummy;}; /* for buggy compilers */
#endif
/* rank Z_BLOCK between Z_NO_FLUSH and Z_PARTIAL_FLUSH */
-#define RANK(f) (((f) << 1) - ((f) > 4 ? 9 : 0))
+#define RANK(f) (((f) * 2) - ((f) > 4 ? 9 : 0))
/* ===========================================================================
* Update a hash value with the given input byte
