Fix orig_getenv

Author: twose

ext/opcache/ZendAccelerator.c

@@ -4798,7 +4798,7 @@ static int accel_finish_startup(void)
 		int (*orig_header_handler)(sapi_header_struct *sapi_header, sapi_header_op_enum op, sapi_headers_struct *sapi_headers) = sapi_module.header_handler;
 		int (*orig_send_headers)(sapi_headers_struct *sapi_headers) = sapi_module.send_headers;
 		void (*orig_send_header)(sapi_header_struct *sapi_header, void *server_context)= sapi_module.send_header;
-		char *(*orig_getenv)(char *name, size_t name_len) = sapi_module.getenv;
+		char *(*orig_getenv)(const char *name, size_t name_len) = sapi_module.getenv;
 		size_t (*orig_ub_write)(const char *str, size_t str_length) = sapi_module.ub_write;
 		void (*orig_flush)(void *server_context) = sapi_module.flush;
 		uint32_t orig_compiler_options = CG(compiler_options);