romfs.c now closes the directories it opens

Fixes #12

src/filepath.h

@@ -33,6 +33,7 @@ typedef struct _stati64 os_stat64_t;
 
 #define os_fopen _wfopen
 #define os_opendir _wopendir
+#define os_closedir _wclosedir
 #define os_readdir _wreaddir
 #define os_stat _wstati64
 #define os_fclose fclose
@@ -48,6 +49,7 @@ typedef struct stat os_stat64_t;
 
 #define os_fopen fopen
 #define os_opendir opendir
+#define os_closedir closedir
 #define os_readdir readdir
 #define os_stat stat
 #define os_fclose fclose

src/romfs.c

@@ -271,6 +271,7 @@ void romfs_visit_dir(romfs_dirent_ctx_t *parent, romfs_ctx_t *romfs_ctx) {
         }
     }
 	
+    os_closedir(dir);
     parent->child = child_dir_tree;
     parent->file = child_file_tree;