libcamera: ipa_manager: Fix handling of unset LIBCAMERA_IPA_MODULE_PATH

If the environment variable LIBCAMERA_IPA_MODULE_PATH is not set
utils::secure_getenv() will return a nullptr. Assigning a nullptr to a
std::string is not valid and results in a crash,

    terminate called after throwing an instance of 'std::logic_error'
      what():  basic_string::_M_construct null not valid

Fix this by operating directly on the returned char array instead of
turning it into a std::string.

Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

0 files changed, 0 insertions, 0 deletions