Ext2FS: Oops, fix forgotten assignment in Ext2FSInode::resize()

If the inode's block list cache is empty, we forgot to assign the
result of computing the block list. The fact that this worked anyway
makes me wonder when we actually don't have a cache..

Thanks to szyszkienty for spotting this! :^)

Kernel/FileSystem/Ext2FileSystem.cpp

@@ -776,7 +776,7 @@ KResult Ext2FSInode::resize(u64 new_size)
     if (!m_block_list.is_empty())
         block_list = m_block_list;
     else
-        fs().block_list_for_inode(m_raw_inode);
+        block_list = fs().block_list_for_inode(m_raw_inode);
 
     if (blocks_needed_after > blocks_needed_before) {
         auto new_blocks = fs().allocate_blocks(fs().group_index_from_inode(index()), blocks_needed_after - blocks_needed_before);