func_callerid: Warn about invalid redirecting reason.

Currently, if a user attempts to set a Caller ID related
function to an invalid value, a warning is emitted,
except for when setting the redirecting reason.
We now emit a warning if we were unable to successfully
parse the user-provided reason.

ASTERISK-30332 #close

Change-Id: Ic341f5d5f7303b6f1115549be64db58a85944f5a

Author: InterLinked1

funcs/func_callerid.c

@@ -1611,6 +1611,7 @@ static int redirecting_write(struct ast_channel *chan, const char *cmd, char *da
 			 * reason, so we can just set the reason string to what was given and set the
 			 * code to be unknown
 			 */
+				ast_log(LOG_WARNING, "Unknown redirecting reason '%s', defaulting to unknown\n", val);
 				redirecting.orig_reason.code = AST_REDIRECTING_REASON_UNKNOWN;
 				redirecting.orig_reason.str = val;
 				set_it(chan, &redirecting, NULL);