Found another long-time error in which a hash table created during

ext2spice is not freed.  This may account for the rest of the memory
leak that was partially fixed in the previous commit.

extflat/EFflat.c

@@ -265,6 +265,7 @@ EFFlatDone()
     efFreeNodeList(&efNodeList);
     HashFreeKill(&efCapHashTable);
     HashKill(&efNodeHashTable);
+    HashKill(&efDistHashTable);
     HashKill(&efHNUseHashTable);
     return;
 }