[patch, fortran] Bug 66575 - Endless compilation on missing end interface

[Jerry DeLisle]

This patch and test case regression tested on x86-64.

Will commit under simple/obvious rule.

Regards,

Jerry

2016-07-04  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

	PR fortran/66575
	* decl.c (match_procedure_interface): Exit loop if procedure
	interface refers to itself.

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