ext/hash: don't emit xxh64 seed deprecation when no seed is given

ext/hash/hash_xxhash.c

@@ -115,11 +115,13 @@ PHP_HASH_API void PHP_XXH64Init(PHP_XXH64_CTX *ctx, HashTable *args)
 		zval *seed = zend_hash_str_find_deref(args, "seed", sizeof("seed") - 1);
 		/* This might be a bit too restrictive, but thinking that a seed might be set
 			once and for all, it should be done a clean way. */
-		if (seed && IS_LONG == Z_TYPE_P(seed)) {
-			XXH64_reset(&ctx->s, (XXH64_hash_t)Z_LVAL_P(seed));
-			return;
-		} else {
-			php_error_docref(NULL, E_DEPRECATED, "Passing a seed of a type other than int is deprecated because it is the same as setting the seed to 0");
+		if (seed) {
+			if (IS_LONG == Z_TYPE_P(seed)) {
+				XXH64_reset(&ctx->s, (XXH64_hash_t)Z_LVAL_P(seed));
+				return;
+			} else {
+				php_error_docref(NULL, E_DEPRECATED, "Passing a seed of a type other than int is deprecated because it is the same as setting the seed to 0");
+			}
 		}
 	}
 

ext/hash/tests/xxhash_options_without_seed.phpt

@@ -0,0 +1,15 @@
+--TEST--
+Hash: xxHash options without a seed do not emit a deprecation
+--FILE--
+<?php
+
+foreach (["xxh32", "xxh64", "xxh3", "xxh128"] as $a) {
+	var_dump(hash($a, "x", options: []) === hash($a, "x"));
+}
+
+?>
+--EXPECT--
+bool(true)
+bool(true)
+bool(true)
+bool(true)