Fixed the exporting of cmdarg_ and CMDARG_ variables for subshells (for real this time)

cmdarg.sh

@@ -324,12 +324,18 @@ function cmdarg_purge
     arrays="$arrays CMDARG_FLAGS CMDARG_TYPES"
     for arr in $arrays
     do
-    	unset $arr
-    	unset $arr[*]
+	str='${!'"$arr"'[@]}'
+	for key in $(eval "echo $str")
+	do
+	    str="$arr[$key]"
+	    eval "unset $str"
+	done
     done
     CMDARG_GETOPTLIST="h"
 }
 
+if [[ "${_DEFINED_CMDARG}" == "" ]]; then
+    export _DEFINED_CMDARG=0
     # Holds the final map of configuration options
     declare -A cmdarg_cfg
     # Maps (short arg) -> (long arg)
@@ -352,7 +358,5 @@ declare -A CMDARG_INFO
     declare -A CMDARG_FLAGS
     # Map of (short arg) -> type (string, array, hash)
     declare -A CMDARG_TYPES
-
-if [[ "${CMDARG_GETOPTLIST}" == "" ]]; then
     CMDARG_GETOPTLIST="h"
 fi