The shell-shocked ex-wife of the homeless madman who allegedly slashed five people in Penn Station broke down Tuesday when she learned about his bloody spree — which capped a years-long downward spiral punctuated by violence. Waleska Morales, 48, shrieked in horror and nearly collapsed as she found out from The Post that Hector Deleon, her common-law spouse of 14 years, stood accused of rampaging through the Midtown transit hub with a dagger Sunday. “Me and him been separated three years for