Prevent warnings about exception__prev from cexcept.h (maybe-uninitialized).
These might be selectively disabled, but the mechanism for doing so is not
obvious.
1""" 2Various flags used during the compilation process. 3""" 4 5PyCF_SOURCE_IS_UTF8=0x0100 6PyCF_DONT_IMPLY_DEDENT=0x0200 7PyCF_ONLY_AST=0x0400 8PyCF_ACCEPT_NULL_BYTES=0x10000000# PyPy only, for compile()