fixed missing bracket

dge_workflow/star_align.sh

@@ -51,7 +51,7 @@ fi
 #http://www.homolog.us/blogs/blog/2012/11/02/star-really-kick-ass-rna-seq-aligner/
 
 ## build index if not present
-if ! -f "${star_index}/SA" ]; then
+if [ ! -f "${star_index}/SA" ]; then
 
 mailme "${project}: creating STAR index for $igenome"
 mkdir ${star_index}