when listing distributions, if one has no ndk_api, consider it to be 0
when listing distributions, if one has no ndk_api, consider it to be 0

this avoids crashes, but also ensure that it doesn't consider it a
match, is that something we want?

rnixx/python-for-android,kivy/python-for-android,rnixx/python-for-android,PKRoma/python-for-android,PKRoma/python-for-android,rnixx/python-for-android,PKRoma/python-for-android,germn/python-for-android,germn/python-for-android,kronenpj/python-for-android,kronenpj/python-for-android,kivy/python-for-android,rnixx/python-for-android,kivy/python-for-android,germn/python-for-android,germn/python-for-android,kivy/python-for-android,germn/python-for-android,kronenpj/python-for-android,kronenpj/python-for-android,germn/python-for-android,PKRoma/python-for-android,rnixx/python-for-android,kronenpj/python-for-android,rnixx/python-for-android,kivy/python-for-android,PKRoma/python-for-android