Fixed processing of GitHub repository URL in worker.sh script. (#3676)

Author: lordmulder

code/worker.sh

@@ -48,7 +48,7 @@ if [ x"${URL:0:22}" == x"https://api.github.com" ] || [ x"${GHURL:0:22}" == x"ht
   echo "URL from GitHub API: $URL"
   GHUSER=$(echo "$URL" | cut -d '/' -f 4)
   GHREPO=$(echo "$URL" | cut -d '/' -f 5)
-  LICENSE=$(echo "$API_JSON" | grep spdx_id | cut -d '"' -f 4 | head -n 1)
+  LICENSE=$(echo "$API_JSON" | grep spdx_id | cut -d '"' -f 4 | head -n 1) || true
 fi
 
 # Download the file if it is not already there