fix null reference exception on blocks with empty MC7 data#253

jogibear9988 merged 1 commit intodotnetprojects:masterdotnetprojects/DotNetSiemensPLCToolBoxLibrary:masterfrom

ryan2445:ryanh/data-block-nre-bugryan2445/DotNetSiemensPLCToolBoxLibrary:ryanh/data-block-nre-bugCopy head branch name to clipboard