Reviewed-by: Dylan Baker <dy...@pnwbakers.com>

Quoting Eric Engestrom (2018-05-11 06:56:13)
> `dep_valgrind != []` now (0.45) produces a warning that is quite explicit:
>   WARNING: Trying to compare values of different types (DependencyHolder, 
> list) using !=.
>   The result of this is undefined and will become a hard error in a future 
> Meson release.
> 
> `dep_valgrind = []` used to be the recommended way to deal with
> non-existant dependency, but these don't work with `.found()`, so now
> the recommended way is to declare a impossible dependency, which
> null_dep does for us in Mesa.
> 
> In short, we don't need and shouldn't check for `!= []` anywhere anymore.
> 
> Signed-off-by: Eric Engestrom <eric.engest...@intel.com>
> ---
>  src/compiler/glsl/glcpp/meson.build | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/src/compiler/glsl/glcpp/meson.build 
> b/src/compiler/glsl/glcpp/meson.build
> index e6a3dc86753d9485c450..09d44ddd68777bca8029 100644
> --- a/src/compiler/glsl/glcpp/meson.build
> +++ b/src/compiler/glsl/glcpp/meson.build
> @@ -57,7 +57,7 @@ glcpp = executable(
>  
>  if with_tests
>    modes = ['unix', 'windows', 'oldmac', 'bizarro']
> -  if dep_valgrind != [] and dep_valgrind.found()
> +  if dep_valgrind.found()
>      modes += ['valgrind']
>    endif
>  
> -- 
> Cheers,
>   Eric
> 

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