missing error message for atomicAdd on non-global storage

The following piece of code produces invalid spirv
calling atomicAdd(dst, 1); directly from ```main``` instead of from ```foo``` works as intended
```
#version 460
#extension GL_EXT_shader_explicit_arithmetic_types : require

layout(binding = 0) buffer myStorageBuffer { uint dst; };
void foo(inout uint a)
{
atomicAdd(a, 1);
}
void main()
{
foo(dst);
// atomicAdd(dst, 1); //
}
```

checking the spirv using spirv-val produces the following output
```
$ spirv-val.exe comp.spv
error: line 47: AtomicIAdd: Function storage class forbidden when the Shader capability is declared.
%14 = OpAtomicIAdd %uint %a %uint_1 %uint_0 %uint_1
```

I'm not entirely sure if taking a reference to a buffer member is legal, but i suppose it shouldn't produce invalid spirv :)