Fix unbound variable errors

seqs/mayan-edms.sh

@@ -25,9 +25,9 @@ seq_config() {
   initSeqConfig "$CONFIG_FILE_NAME" "$CONFIG_FILE_TEMPLATE"
   if [ $? -eq 0 ] ; then
     CONFIG=1
-    postgresDb="$MAYAN_DB"
-    postgresUser="$MAYAN_DBUSER"
-    postgresPass="$MAYAN_DBPASS"
+    postgresDb="${MAYAN_DB:-}"
+    postgresUser="${MAYAN_DBUSER:-}"
+    postgresPass="${MAYAN_DBPASS:-}"
   else
     # End if no configuration file exists
     dry || return -1
@@ -223,7 +223,7 @@ readDatabaseInfos() {
 
 # Needs readDatabaseInfos() to execute some commands
 toolScript() {
-  if [ ! -z "$1" ] ; then
+  if [ -n "${1:-}" ] ; then
     readDatabaseInfos
   fi