MERGE: #15676: mmap: add empty file check prior to offset check <- Previous patch was incomplete (fix 2)

constructing infinities. This is done for backwards compatibility
with decimal.py: Infinity coefficients are undefined in _decimal
(in accordance with the specification).

Fixed reference leak in error branch of _bufferedreader_read_all(). The variable data can contain a bytes object but it wasn't cleaned up when PyList_New() failed. CID 715364

Fixed memory leak in error branch of object_repr which may leak a reference to mod when type_qualname returns NULL. CID 715371

Fixed memory leak in error branch of object_repr which may leak a reference to mod when type_name returns NULL. CID 715371

Fixed memory leak in error branch of parsestrplus. CID 715374 Variable s going out of scope leaks the storage it points to.

Fixed memory leak in error branch of parsestrplus. CID 715374 Variable s going out of scope leaks the storage it points to.

Also adds tests to verify the documented behavior (which is probably a bug, as
indicated in the added comments).

Patch by Chris Jerdonek.

Also adds tests to verify the documented behavior (which is probably a bug, as
indicated in the added comments).

Patch by Chris Jerdonek.

	changeset:   77827:c23b442b5d5e
	user:        Antoine Pitrou <solipsis@pitrou.net>
	date:        Thu Jun 28 01:20:26 2012 +0200
	summary:     Avoid using scrdir, it's broken.

	changeset:   77826:f0e58e778215
	user:        Neil Schemenauer <nas@arctrix.com>
	date:        Wed Jun 27 15:58:37 2012 -0600
	summary:     Fix bug in test_tools that prevented building is separate directory.

Fixed out-of-bounce write to rawmode buffer. The fixed size buffer wasn't enlarged for the new 'x' flag. The buffer may contain the 5 flags xrwa+ and the \0 byte

Py_TYPE() has already dereferenced self before the NULL check. Moved Py_TYPE() after the check for self == NULL

Py_TYPE() has already dereferenced self before the NULL check. Moved Py_TYPE() after the check for self == NULL

Fixed two memory leaks in make_filename() in zipimport.c. The allocated buffer wasn't cleaned up in two error cases. CID 486832

Make sure that *really* no more than sizeof(ifr.ifr_name) chars are strcpy-ed to ifr.ifr_name and that the string is *always* NUL terminated. New code shouldn't use strcpy(), too. CID 719692