Remove my_estrdup() and my_efree() macros

Replace the single use of my_efree().

Author: nikic

ext/mysqli/mysqli.c

@@ -200,7 +200,9 @@ static void mysqli_objects_free_storage(zend_object	*object)
 	mysqli_object 	*intern = php_mysqli_fetch_object(object);
 	MYSQLI_RESOURCE	*my_res = (MYSQLI_RESOURCE *)intern->ptr;
 
-	my_efree(my_res);
+	if (my_res) {
+		efree(my_res);
+	}
 	zend_object_std_dtor(&intern->zo);
 }
 /* }}} */

ext/mysqli/php_mysqli_structs.h

@@ -342,9 +342,6 @@ ZEND_END_MODULE_GLOBALS(mysqli)
 ZEND_TSRMLS_CACHE_EXTERN()
 #endif
 
-#define my_estrdup(x) (x) ? estrdup(x) : NULL
-#define my_efree(x) if (x) efree(x)
-
 ZEND_EXTERN_MODULE_GLOBALS(mysqli)
 
 #endif	/* PHP_MYSQLI_STRUCTS.H */