sig_analog: Eliminate potential timeout with Last Number Redial.

If Last Number Redial is used to redial, ensure that we do not wait
for further digits. This was possible if the number that was last
dialed is a prefix of another possible dialplan match. Since all we
did is copy the number into the extension buffer, if other matches
are now possible, there would thus be a timeout before the call went
through. We now complete redialed calls immediaetly in all cases.

Resolves: #1483

channels/sig_analog.c

@@ -2421,6 +2421,7 @@ static void *__analog_ss_thread(void *data)
 		}
 		while (len < AST_MAX_EXTENSION-1) {
 			int is_exten_parking = 0;
+			int is_lastnumredial = 0;
 
 			/* Read digit unless it's supposed to be immediate, in which case the
 			   only answer is 's' */
@@ -2455,6 +2456,9 @@ static void *__analog_ss_thread(void *data)
 					analog_lock_private(p);
 					ast_copy_string(exten, p->lastexten, sizeof(exten));
 					analog_unlock_private(p);
+					/* If Last Number Redial was used, even if the user might normally be able to dial further
+					 * digits for the digits dialed, we should complete the call immediately without delay. */
+					is_lastnumredial = 1;
 				} else {
 					ast_verb(3, "Last Number Redial not possible on channel %d (no saved number)\n", p->channel);
 					res = analog_play_tone(p, idx, ANALOG_TONE_CONGESTION);
@@ -2464,7 +2468,7 @@ static void *__analog_ss_thread(void *data)
 				}
 			}
 			if (ast_exists_extension(chan, ast_channel_context(chan), exten, 1, p->cid_num) && !is_exten_parking) {
-				if (!res || !ast_matchmore_extension(chan, ast_channel_context(chan), exten, 1, p->cid_num)) {
+				if (!res || is_lastnumredial || !ast_matchmore_extension(chan, ast_channel_context(chan), exten, 1, p->cid_num)) {
 					if (getforward) {
 						/* Record this as the forwarding extension */
 						analog_lock_private(p);