Fix dangling reference in comment

[Eric Botcazou]

var_map_base_init is gone and all the machinery is now in tree-ssa-coalesce.c 
(and the 2 functions have explicit back references to gimple_can_coalesce_p).

Tested on x86_64-suse-linux, applied on the mainline and 6 branch as obvious.


2016-05-04  Eric Botcazou  <ebotcazou@adacore.com>

	* tree-ssa-coalesce.c (gimple_can_coalesce_p): Fix reference in head
	comment.
	(compute_samebase_partition_bases): Fix typo.

-- 
Eric Botcazou
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