added missing type specifier

Author: weltling

win32/winutil.h

@@ -20,7 +20,7 @@ PHPAPI char *php_win32_error_to_msg(HRESULT error);
 
 #define php_win_err()	php_win32_error_to_msg(GetLastError())
 int php_win32_check_trailing_space(const char * path, const int path_len);
-PHPAPI php_win32_get_random_bytes(unsigned char *buf, size_t size);
+PHPAPI int php_win32_get_random_bytes(unsigned char *buf, size_t size);
 
 #ifdef ZTS
 void php_win32_init_rng_lock();