Do not cast away constness

Fix most compiler warnings caused by building Perl extensions with
-Wcast-qual. This is realized by changing the type of multiple T *
arguments into const T * and by changing a few (T *) casts
into (const T *).

1 files changed, 1 insertions, 1 deletions

diff --git a/zaphod32_hash.h b/zaphod32_hash.h
index 8b15adfb45..bf802ccbb7 100644
--- a/zaphod32_hash.h
+++ b/zaphod32_hash.h
@@ -178,7 +178,7 @@ U32 zaphod32_hash_with_state(
     const U8 *key,
     const STRLEN key_len
 ) {
-    U32 *state= (U32 *)state_ch;
+    const U32 *state= (const U32 *)state_ch;
     const U8 *end;
     STRLEN len = key_len;
     U32 v0= state[0];