Update variables.sh and dump978.sh

variables.sh - typo
dump978.sh - dump978-maint.sh should not background rtl_sdr in while loop, otherwise it will try to re-start rtl_sdr every 15 seconds and throw errors

bash/decoders/dump978.sh

@@ -222,7 +222,7 @@ tee $DUMP978BUILDDIRECTORY/dump978-maint.sh > /dev/null <<EOF
 
 # Start dump978 without logging.
 while true; do
-    rtl_sdr -d $DUMP978DEVICE -f 978000000 -s 2083334 -g 48 - | $DUMP978BUILDDIRECTORY/dump978 | $DUMP978BUILDDIRECTORY/uat2json $LIGHTTPDDOCUMENTROOTDIRECTORY/dump978/data | $DUMP978BUILDDIRECTORY/uat2esnt | /bin/nc -q1 127.0.0.1 30001 &
+    rtl_sdr -d $DUMP978DEVICE -f 978000000 -s 2083334 -g 48 - | $DUMP978BUILDDIRECTORY/dump978 | $DUMP978BUILDDIRECTORY/uat2json $LIGHTTPDDOCUMENTROOTDIRECTORY/dump978/data | $DUMP978BUILDDIRECTORY/uat2esnt | /bin/nc -q1 127.0.0.1 30001
     sleep 15
 done
 EOF

bash/variables.sh

@@ -1,4 +1,4 @@
-5#!/bin/bash
+#!/bin/bash
 
 #####################################################################################
 #                                  ADS-B RECEIVER                                   #