The commandline "notify" application was always attempting to load an
icon path from an optional argument, even when the argument was
omitted. In this case, the image icon argument would be a null pointer
and the notify program would crash.
This fix adds a conditional to only attempt to load the icon file if
the icon_path variable is not a null pointer
SPDX License Identifiers are a more compact / standardized
way of representing file license information.
See: https://spdx.dev/resources/use/#identifiers
This was done with the `ambr` search and replace tool.
ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
