many cleanups (forgotten includes)

mstorage.h

@@ -13,7 +13,7 @@ extern mstorage_t mstorage_root;
 /* Works like strstorage_add, but will return an
  * offset to mstorage_root, which is mmapped and may thus change. */
 /* negative offset == error */
-const long mstorage_add(mstorage_t* p,const char* s,unsigned long n);
+long mstorage_add(mstorage_t* p,const char* s,unsigned long n);
 
 /* undo mapping */
 void mstorage_unmap(mstorage_t* p);