Fix NPE in IdenticalExpressionsDiagnostic when ctx.children is null#3679

nixel2007 merged 3 commits intodevelop1c-syntax/bsl-language-server:developfrom

copilot/fix-nullpointerexception-ctx-children1c-syntax/bsl-language-server:copilot/fix-nullpointerexception-ctx-childrenCopy head branch name to clipboard