ignore empty lines in KEYFILE

src/resifdatadump

@@ -319,7 +319,7 @@ if [[ -r ${RESIFDD_KEYFILE} ]]; then
     echo "Using $RESIFDD_KEYFILE as references to transfer data"
     # Make a list of directories from KEYFILE and pass it to pack_and_send
     # We use only the first word of each line, compose a full path and test for it's existence
-    for i in $(sed -e "s, .*$,," -e "s,_,/,g" -e "s,^,$SNAPSHOT_DIR/," $RESIFDD_KEYFILE |sort -u); do
+    for i in $(sed -e "s, .*$,," -e "/^\s*$/d" -e "s,_,/,g" -e "s,^,$SNAPSHOT_DIR/," $RESIFDD_KEYFILE |sort -u); do
         if [[ -d $i ]]; then
             pack_and_send $i
         else