Correct "dahdi show channels" output when specifying a group.

Since a DAHDI channel may belong to multiple groups, we need to use
a bitwise and instead of equivalence to determine whether to display
the channel information.


(closes issue #15248)
Reported by: gentian
Patches:
      15248.patch uploaded by mmichelson (license 60)
Tested by: gentian



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@199227 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_dahdi.c

@@ -16008,7 +16008,7 @@ static char *dahdi_show_channels(struct ast_cli_entry *e, int cmd, struct ast_cl
 		if (filtertype) {
 			switch(filtertype) {
 			case 1: /* dahdi show channels group <group> */
-				if (tmp->group != targetnum) {
+				if (!(tmp->group & targetnum)) {
 					tmp = tmp->next;
 					continue;
 				}