Fix phpize on windows

It seems like n === undefined must have worked on older versions of jscript, but currently it just causes the insertion to silently fail.
This sets n to the current folder name, allowing phpize to include the local config.w32 files.

Author: bwoebi

win32/build/phpize.js.in

@@ -91,6 +91,7 @@ function find_config_w32(dirname)
 
 		deps = get_module_dep(contents);
 
+		n = f.Name;
 		item = new Module_Item(n, c, dir_line, deps, contents);
 		MODULES.Add(n, item);
 	}