fix Clang warning

Author: zeriyoshi

ext/standard/php_random_class.h

@@ -28,7 +28,7 @@ typedef struct _php_random_class_algo {
 	const unsigned char bytes;
 	const size_t state_size;
 	uint64_t (*next)(void *state);
-	void* (*init)();
+	void* (*init)(void);
 	void (*seed)(void *state, const zend_long seed);
 	int (*serialize)(void *state, zval *return_value);
 	int (*unserialize)(void *state, HashTable *data);

ext/standard/random_class.c

@@ -344,7 +344,7 @@ static uint64_t xorshift128plus_next(void *state) {
 	return r;
 }
 
-static void* xorshift128plus_init() {
+static void* xorshift128plus_init(void) {
 	return ecalloc(1, sizeof(xorshift128plus_state));
 }
 
@@ -445,7 +445,7 @@ static uint64_t mt19937_next(void *state) {
 	return ( s1 ^ (s1 >> 18) );
 }
 
-static void* mt19937_init() {
+static void* mt19937_init(void) {
 	return ecalloc(1, sizeof(mt19937_state));
 }