fix a seg fault in this application if no context paramater is given

(issue #7571)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@38118 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/apps/app_directed_pickup.c b/apps/app_directed_pickup.c
index 55001abcb2214aa247cd4eff0332247956a77eb7..c79bad26ffb33488f3d6347b168c9082bd71405f 100644 (file)
--- a/apps/app_directed_pickup.c
+++ b/apps/app_directed_pickup.c
@@ -83,7 +83,7 @@ static int pickup_exec(struct ast_channel *chan, void *data)
                        *context++ = '\0';
 
                /* If the context is the pickup mark, iterate through all channels finding the right origin one */
-               if (!strcmp(context, PICKUPMARK)) {
+               if (context && !strcmp(context, PICKUPMARK)) {
                        while ((origin = ast_channel_walk_locked(origin))) {
                                if (origin) {
                                        tmp2 = pbx_builtin_getvar_helper(origin, PICKUPMARK);