Backport the change to chan_iax2 to return NULL instead of a "null frame"

from its read callback.  See revision 59341 to the 1.4 branch for more info.


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.2@59355 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_iax2.c

@@ -3164,9 +3164,8 @@ static int iax2_setoption(struct ast_channel *c, int option, void *data, int dat
 
 static struct ast_frame *iax2_read(struct ast_channel *c) 
 {
-	static struct ast_frame f = { AST_FRAME_NULL, };
-	ast_log(LOG_NOTICE, "I should never be called!\n");
-	return &f;
+	ast_log(LOG_NOTICE, "I should never be called! Hanging up.\n");
+	return NULL;
 }
 
 static int iax2_start_transfer(unsigned short callno0, unsigned short callno1)