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[Ada] Fix minor memory leak in GNAT.Command_Line

From: Arnaud Charlet <charlet at adacore dot com>
To: gcc-patches at gcc dot gnu dot org
Cc: Emmanuel Briot <briot at adacore dot com>
Date: Thu, 16 Jun 2016 06:26:00 -0400
Subject: [Ada] Fix minor memory leak in GNAT.Command_Line
Authentication-results: sourceware.org; auth=none

When a new switch is defined with a specific name for its parameter,
that name is not freed. This is a minor leak, since such switches
are in general defined once at the beginning of the program, and
never modified afterwards.
Detected with valgrind.

Tested on x86_64-pc-linux-gnu, committed on trunk

2016-06-16  Emmanuel Briot  <briot@adacore.com>

	* g-comlin.adb: Fix minor memory leak in GNAT.Command_Line.

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