Trying to fix compiler warnings (on Windows).

Author: Ulf Wendel

ext/mysql/php_mysql.c

@@ -637,7 +637,7 @@ PHP_RSHUTDOWN_FUNCTION(mysql)
 		efree(MySG(connect_error));
 	}
 
-#ifdef A0 && MYSQL_USE_MYSQLND
+#if defined(A0) && MYSQL_USE_MYSQLND
 	zend_hash_apply(&EG(persistent_list), (apply_func_t) php_mysql_persistent_helper TSRMLS_CC);
 #endif
 
@@ -888,7 +888,7 @@ static void php_mysql_do_connect(INTERNAL_FUNCTION_PARAMETERS, int persistent)
 			mysql->multi_query = 0;
 #endif
 			/* ensure that the link did not die */
-#if A0 && defined(MYSQL_USE_MYSQLND)
+#if defined(A0) && MYSQL_USE_MYSQLND
 			mysqlnd_end_psession(mysql->conn);
 #endif
 			if (mysql_ping(mysql->conn)) {

ext/mysqli/mysqli.c

@@ -895,7 +895,7 @@ PHP_RSHUTDOWN_FUNCTION(mysqli)
 	if (MyG(error_msg)) {
 		efree(MyG(error_msg));
 	}
-#ifdef A0 && MYSQLI_USE_MYSQLND
+#if defined(A0) && MYSQLI_USE_MYSQLND
 	/* psession is being called when the connection is freed - explicitly or implicitly */
 	zend_hash_apply(&EG(persistent_list), (apply_func_t) php_mysqli_persistent_helper_once TSRMLS_CC);
 #endif