Fix warning when last argument is null (#3975)#4014

ppkarwasz merged 1 commit intoapache:2.xapache/logging-log4j2:2.xfrom

lrozenblyum:fix/2.x/logging-with-null-throwable-warninglrozenblyum/logging-log4j2:fix/2.x/logging-with-null-throwable-warningCopy head branch name to clipboard