modulecmd: PMODULES_ENV initialisation fixed

PMODULES_ENV must be initialised before modulecmd.bin is called

Pmodules/modulecmd.bash.in

@@ -131,12 +131,12 @@ save_env() {
         vars+=( OverlayDict Dir2OverlayMap)
 
 	local s=$(typeset -p ${vars[@]})
-	declare -g PMODULES_ENV=$( encode_base64 "$s" )
-	export_env 'PMODULES_ENV'
+	declare -gx PMODULES_ENV=$( encode_base64 "$s" )
 }
 
 _exit() {
 	save_env "${g_env_must_be_saved}"
+	export_env 'PMODULES_ENV'
 	if [[ -n "${tmpfile}" ]] && [[ -e "${tmpfile}" ]]; then
 		${rm} -f "${tmpfile}" || :
 	fi
@@ -1852,6 +1852,7 @@ pmodules_init() {
 	init_overlay_vars
         init_modulepath
         init_manpath
+	save_env
         export_env \
                 LOADEDMODULES \
                 _LMFILES_ \