Fix randomness. save_pos was being set to 0 initially instead of -1, causing it to jump to position 0 when moh started.

(closes issue #10859)
Reported by: jamesgolovich
Patches:
      asterisk-mohpos2.diff.txt uploaded by jamesgolovich (license 176)


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@84160 65c4cc65-6c06-0410-ace0-fbb531ad65f3

res/res_musiconhold.c

@@ -312,6 +312,7 @@ static void *moh_files_alloc(struct ast_channel *chan, void *params)
 	if (!chan->music_state && (state = ast_calloc(1, sizeof(*state)))) {
 		chan->music_state = state;
 		state->class = class;
+		state->save_pos = -1;
 	} else 
 		state = chan->music_state;