[dinput] Don't check a parameter twice (Coccinelle)

[Paul Vriens]

Hi,

We check and return with an ERR a few lines down. The main difference is 
that 'name' is now set if present.

Found with the help of Coccinelle and the CocciCheck scripts.

Changelog
   Don't check a parameter twice (Coccinelle)

-- 
Cheers,

Paul.

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