glsl: copy each field's precision information in glsl_types's structure constructor

Signed-off-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>

src/glsl/nir/glsl_types.cpp

@@ -129,6 +129,7 @@ glsl_type::glsl_type(const glsl_struct_field *fields, unsigned num_fields,
       this->fields.structure[i].image_coherent = fields[i].image_coherent;
       this->fields.structure[i].image_volatile = fields[i].image_volatile;
       this->fields.structure[i].image_restrict = fields[i].image_restrict;
+      this->fields.structure[i].precision = fields[i].precision;
    }
 
    mtx_unlock(&glsl_type::mutex);