gffcompare: Fix problem with repeat class code

Added an additional check to check if the transcript class code is not a repeat ("-r"). Otherwise it introduces an empty gene_id ("-"), breaking the RESTORE_BIOTYPE step.

modules/gffcompare/gffcompare.nf

@@ -30,7 +30,7 @@ process GFFCOMPARE {
 
     awk 'BEGIN{
         while(getline<"gffcmp.tracking">0){
-            if ($4 !="u"){
+            if ($4 !="u" && $4 !="r"){
                 split($3,gn,"|");
                 split($5,tx,"|"); 
                 final["\\""tx[2]"\\";"]="\\""gn[1]"\\";"