Trivial change to read the number of samples from a frame before calling ast_write()

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@114545 65c4cc65-6c06-0410-ace0-fbb531ad65f3

res/res_musiconhold.c

@@ -304,8 +304,8 @@ static int moh_files_generator(struct ast_channel *chan, void *data, int len, in
 	while (state->sample_queue > 0) {
 		if ((f = moh_files_readframe(chan))) {
 			state->samples += f->samples;
-			res = ast_write(chan, f);
 			state->sample_queue -= f->samples;
+			res = ast_write(chan, f);
 			ast_frfree(f);
 			if (res < 0) {
 				ast_log(LOG_WARNING, "Failed to write frame to '%s': %s\n", chan->name, strerror(errno));