Drop superfluous check; StringAppend also checks if string is not null
treeda2473079d610db3045bd55c77d5861fc37e5414
-rw-r--r-- 429 .gitignore
-rw-r--r-- 560 .gitmodules
-rw-r--r-- 224 .mailmap
-rw-r--r-- 255 .tgitconfig
drwxr-xr-x - Languages
-rw-r--r-- 2878 build.txt
drwxr-xr-x - contrib
drwxr-xr-x - doc
drwxr-xr-x - ext
-rw-r--r-- 1742 release.txt
drwxr-xr-x - src
drwxr-xr-x - test