Revert "Improve is_val_ptr()'s implementation with v_get_type()"
Revert "Improve is_val_ptr()'s implementation with v_get_type()"

This reverts commit 062c9e6618f053ae56ec448f736802ca53206511.

bobrippling/ucc-c-compiler,bobrippling/ucc-c-compiler,bobrippling/ucc-c-compiler