Update process_output.sh

Fix issue with files being treated as directories.

scripts/crons/process_output.sh

@@ -7,6 +7,8 @@ cd ~/mtgencode/cards
 
 for folder in $(ls); do
 	for sub in ${ ls ${folder} };do 
+		if [ ! -d $folder/$sub ]; then
+			continue
 		if [ ! -e $folder/$sub/summary.txt ]; then
 			./scritps/summarize.py -a -v $folder/$sub/output.txt > summary.txt
 		fi