Revert part of issue #5620 (revision 6965) as it appears that it was in error.

This should fix talk call progress on analog lines.
(closes issue #12178)
 Reported by: michael-fig
 Patches: 
       20080717__bug12178.diff.txt uploaded by Corydon76 (license 14)


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@131790 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_dahdi.c

@@ -5321,12 +5321,13 @@ static struct ast_channel *dahdi_new(struct dahdi_pvt *i, int state, int startpb
 			else
 				i->dsp = NULL;
 			if (i->dsp) {
-				i->dsp_features = features & ~DSP_PROGRESS_TALK;
+				i->dsp_features = features;
 #ifdef HAVE_PRI
 				/* We cannot do progress detection until receives PROGRESS message */
 				if (i->outgoing && (i->sig == SIG_PRI)) {
 					/* Remember requested DSP features, don't treat
 					   talking as ANSWER */
+					i->dsp_features = features & ~DSP_PROGRESS_TALK;
 					features = 0;
 				}
 #endif