WI #2306 Protect against NullReferenceException when reading NameLiteral property#2801

fm-117 wants to merge 3 commits intodevelopTypeCobolTeam/TypeCobol:developfrom

2306-nullpointerexception-in-diagnosticutilsadderrornode-node-string-message-symbolreference-symbol-messagecode-codeTypeCobolTeam/TypeCobol:2306-nullpointerexception-in-diagnosticutilsadderrornode-node-string-message-symbolreference-symbol-messagecode-codeCopy head branch name to clipboard