nir/linking_helpers: force type matching in does_varying_match

this otherwise breaks when i/o is scalarized in the producer but not
the consumer

cc: mesa-stable

Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24458>

src/compiler/nir/nir_linking_helpers.c

@@ -1001,7 +1001,8 @@ static bool
 does_varying_match(nir_variable *out_var, nir_variable *in_var)
 {
    return in_var->data.location == out_var->data.location &&
-          in_var->data.location_frac == out_var->data.location_frac;
+          in_var->data.location_frac == out_var->data.location_frac &&
+          in_var->type == out_var->type;
 }
 
 static nir_variable *