[Toybox] [PATCH] 4a4b3d65644ce403b0f22887fc0d38b0202ec8c7 upset clang.

[enh]

Recent-ish clang doesn't like self-assignment. Google/Android code always
uses the [template-based moral equivalent of] __attribute__((__unused__))
to keep both compilers happy.
---
 lib/lib.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)
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