Fix qget call return types

This fixes the return types for calls to the C qget_.. functions.
The Python bool type maps to a 4 byte integer, which results in
incorrect return values when running against an optimized Cyclone
C library (in this case only for optimized Windows builds).

By replacing the return type with a c_bool, the Python wrapper
correctly reads the boolean as 1 byte.

Signed-off-by: Dennis Potman <dennis@zettascale.tech>