modulecmd/libpmodules: bugfixes in scaning group depths

Pmodules/libpmodules.bash.in

@@ -43,7 +43,7 @@ compute_group_depth () {
 	test -d "${dir}" || return 1
         local group=${dir%/*}
         local group=${group##*/}
-	local -i result=$(${find} "${dir}" -depth \( -type f -o -type l \) \
+	result=$(${find} "${dir}" -depth \( -type f -o -type l \) \
                           -printf "%d" -quit 2>/dev/null)
 	(( result-=2 ))
 	# if a group doesn't contain a modulefile, depth is negativ
@@ -59,12 +59,14 @@ compute_group_depth () {
 #
 scan_groups () {
         local    ol
+	local depth
         for ol in "$@"; do
 		local mod_root="${OverlayInfo[${ol}:mod_root]}"
-		local -i depth
 	        local dir
 	        for dir in ${mod_root}/*/${PMODULES_MODULEFILES_DIR}; do
-			if [[ -n "${GroupDepths[${group}]}" ]]; then
+			local group="${dir%/*}"
+			group="${group##*/}"
+			if [[ ! -v GroupDepths[${group}] ]]; then
 				compute_group_depth depth "${dir}"
 				GroupDepths[$group]=${depth}
 			fi