git: libc/db: Add an include guard.

[Sascha Wildner]

commit 724ac6b9dd8bc25fc37a6633244827d8e2f20d6f
Author: Sascha Wildner <saw at online.de>
Date:   Sun Apr 7 17:46:06 2019 +0200

    libc/db: Add an include guard.
    
    joerg had added one back in 2005 in 871020e7804af32d9a544b48cd250fa4
    but it was overwritten 8 years later in another sync with FreeBSD in
    abd448c3b2d3508465e48d9cfdb163ef88fc242e.
    
    This fixes a number of -Wredundant-decls which we'll hopefully enable
    by default in the future.

Summary of changes:
 lib/libc/db/btree/extern.h | 5 +++++
 1 file changed, 5 insertions(+)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/724ac6b9dd8bc25fc37a6633244827d8e2f20d6f


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