code cleanup: force local var before calling a for loop, make sure it's unset when no longer needed

lib/filefct.sh

@@ -28,6 +28,7 @@ backupdist()
         exit 11
     fi
 
+    local file=
     for file in $@; do
         local tmstmp=$(stdtime)
         if [[ - L ${file} ]]; then
@@ -50,7 +51,9 @@ backupdist()
         else
             prnt W "backupdist(): $file n'existe pas, rien à faire."
         fi
+        unset tmstmp
     done
+    unset file
 }
 export -f backupdist
 
@@ -72,6 +75,7 @@ installfile()
         die 7
     fi
 
+    local arg=
     for arg in $@; do
         if [[ -f $MYPATH/repo/hosts/$HOSTNAME/$arg ]]; then
             filelist="$filelist $MYPATH/repo/hosts/$HOSTNAME/$arg"
@@ -82,15 +86,19 @@ installfile()
             filelist="$filelist $arg"
         fi
     done
-    
+    unset arg
+
     # Empty to just obtain the target which is the last element of the list
-    for i in $filelist; do
+    local file=
+    for file in $filelist; do
         :
     done
-    if [[ ! $i == /* ]]; then
+    if [[ ! $file == /* ]]; then
         prnt E "installfile(): Target must be on the root filesystem and full path must be provided."
         die 13
     fi
+    unset file
+
     if [[ -d $(dirname $i) ]]; then
         prnt I "Création du répertoire $(dirname $i) d'accueil..."
         mkdir -pv $(dirname $i)