Fix CID-1414686: PyInit_readline() handles errors#4647
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Handle PyModule_AddIntConstant() and PyModule_AddStringConstant() failures. Add also constants before calling setup_readline(), since setup_readline() registers callbacks which uses a reference to the module, whereas the module is destroyed if adding constants fails. Fix Coverity warning: CID 1414686: Unchecked return value (CHECKED_RETURN) 2. check_return: Calling PyModule_AddStringConstant without checking return value (as is done elsewhere 45 out of 55 times).
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Handle PyModule_AddIntConstant() and PyModule_AddStringConstant()
failures. Add also constants before calling setup_readline(), since
setup_readline() registers callbacks which uses a reference to the
module, whereas the module is destroyed if adding constants fails.
Fix Coverity warning:
CID 1414686: Unchecked return value (CHECKED_RETURN)
2. check_return: Calling PyModule_AddStringConstant without checking
return value (as is done elsewhere 45 out of 55 times).