Fixed issue #23.
Fixed issue #23.

Added "except *" clauses to convert_to_int_rect() and
convert_to_vector2f(), so that Cython checks whether they raised an
exception every time they're called. This is slower than returning an
error code when an exception is raised, but I didn't see any
performance difference when testing both cases.

mkeeter/pysfml2-cython,bastienleonard/pysfml-cython,bastienleonard/pysfml-cython,mkeeter/pysfml2-cython