Clarification on last_comp_len logic in zram_write_page

[Dheeraj Reddy Jonnalagadda <dheeraj.linuxdev@xxxxxxxxx>]

Dear Maintainers,

I am writing to seek clarification regarding the use of last_comp_len
variable in zram_write_page function. Specifically, Coverity has flagged 
the issue (CID 1602439) in zram/zram_drv.c

Link to the coverity issue:
https://scan7.scan.coverity.com/#/project-view/52337/11354?selectedIssue=1602439

Currently, last_comp_len is initialized to 0 but never updated within the
function. This renders the conditional block shown below as dead code.

	if (last_comp_len && (last_comp_len != comp_len)) {
    		zs_free(zram->mem_pool, handle);
    		handle = -ENOMEM;
	}