Tweak c_scan script to facilitate refine

scripts/catalogue/c_scan_N_fixed_data.sh

 # The data can then be used to produce animated graphs (with c_int evolving),
 # see the `c_scan_N_fixed_dsfs[_plot]` scripts.
 
-if [[ $# -ne 5 ]]; then
-    echo "Arguments needed: whichDSF, kBT, target_sumrule, N, nkmax (max momentum in units of kF/4)."
+if [[ $# -ne 7 ]]; then
+    echo "Arguments needed: whichDSF, kBT, target_sumrule, N, nkmax (max momentum in units of kF/4), Max_Secs (per c), refine."
     exit 1
 fi
 
     exit 1
 fi
 
+if [[ $6 -lt 0 ]]; then
+    echo "Max_Secs must be > 0."
+    exit 1
+fi
+
+if [[ $7 != 0 && $7 != 1 ]]; then
+    echo "refine must be 0 (false) or 1 (true)."
+    exit 1
+fi
+
 timestart=$(date +%s)
 
 whichDSF=$1
 target_sumrule=$3
 N=$4
 nkmax=$5
+Max_Secs=$6
+refine=$7
 
 correlator='rho-rho'
 if [[ $whichDSF == 'o' ]]; then
 
 iKmax=$(($nkmax * $N/8))
 
-Max_Secs=3600
-refine=0
 
 # List of interactions: fractional powers of 2
 clist_raw=()
 if [[ -d $dircheck ]]; then
     echo 'A c scan with these parameters already exists. Aborting.'
     echo 'If you really want to run this command, please first delete directory:\n'$dircheck
-    exit
+    exit 1
 fi