few improvements, consistency fixes

lib/support.sh

@@ -79,13 +79,16 @@ show_version()
     
     local mod=
     for mod in $MYPATH/modules/*.sh; do
-        . $mod
-        local modname=$(get_mod_name $mod)
-        local version=VER_$modname
+        # Ran in a subshell to not pollute environment
+        (
+            . $mod
+            local modname=$(get_mod_name $mod)
+            local version=VER_$modname
 
-        echo -e "\t$BWhite$modname${DEFAULTCOL}: $BGreen${!version}$DEFAULTCOL"
+            echo -e "\t$BWhite$modname${DEFAULTCOL}: $BGreen${!version}$DEFAULTCOL"
 
-        unset modname version
+            unset modname version
+        )
     done
     unset mod
     
@@ -100,6 +103,10 @@ export -f show_version
 # Get module name from module file
 get_mod_name()
 {
+    if [[ $# -ne 1 ]] then
+        prnt E "get_mod_name(): Bad number of parameters."
+        die 11 --force
+    fi
     echo $(basename $1 | cut -f 1 -d '.')
 }
 export -f get_mod_name