Merge branch 'tg/refs-allowed-flags' into maint

API error-proofing which happens to also squelch warnings from GCC.

* tg/refs-allowed-flags:
  refs: strip out not allowed flags from ref_transaction_update

Author: gitster

refs.c

@@ -921,6 +921,8 @@ int ref_transaction_update(struct ref_transaction *transaction,
 		return -1;
 	}
 
+	flags &= REF_TRANSACTION_UPDATE_ALLOWED_FLAGS;
+
 	flags |= (new_sha1 ? REF_HAVE_NEW : 0) | (old_sha1 ? REF_HAVE_OLD : 0);
 
 	ref_transaction_add_update(transaction, refname, flags,

refs.h

@@ -354,6 +354,14 @@ int refs_pack_refs(struct ref_store *refs, unsigned int flags);
 #define REF_NODEREF	0x01
 #define REF_FORCE_CREATE_REFLOG 0x40
 
+/*
+ * Flags that can be passed in to ref_transaction_update
+ */
+#define REF_TRANSACTION_UPDATE_ALLOWED_FLAGS \
+	REF_ISPRUNING |                      \
+	REF_FORCE_CREATE_REFLOG |            \
+	REF_NODEREF
+
 /*
  * Setup reflog before using. Fill in err and return -1 on failure.
  */