core: don't crash on error if response is NULL

Various bits of the code didn't check if response was valid
or not during error conditions, and when an error occurs
sometimes it'll be NULL (since not all errors are translated
errors from the modem, some are serial or general ones).  We
have to make sure we don't try to use response->str when
response doesn't exist.

Found in the generic CDMA code likely as a result of
d5d9eec2b52363a7460aeec0c020b1c6a7af6b03 but was a bug long
before that commit happened anyway.

0 files changed, 0 insertions, 0 deletions