re PR c++/90484 (ICE in equal_mem_array_ref_p at gcc/tree-ssa-scopedtables.c:550 since r270433 on i586)

	PR c++/90484
	* tree-ssa-scopedtables.c (equal_mem_array_ref_p): Don't assert that
	sz0 is equal to sz1, instead return false in that case.

From-SVN: r271299