char mins done; need to shuffle some error condition checks before

pwgenerator/funcs_charset.go

@@ -82,11 +82,7 @@ func (c *CharSet) String() (s string) {
 // Swap will swap the position of the item at index i and the item at index j in a CharSet (needed for sort.Interface).
 func (c *CharSet) Swap(i, j int) {
 
-	var iVal Char = (*c)[i]
-	var jVal Char = (*c)[j]
-
-	(*c)[i] = jVal
-	(*c)[j] = iVal
+	(*c)[j], (*c)[i] = (*c)[i], (*c)[j]
 
 	return
 }