* test-suite/Makefile.am:
* test-suite/tests/bitvectors.test: Add a new file to test bitvectors.
* libguile/uniform.c (scm_c_uniform_vector_length): Don't call
scm_uniform_vector_elements, as we don't need to be able to access the
elements with pointers to bytes. Fixes uniform-vector-length on
bitvectors.
