tweak error handling. Found by Klockwork (www.klocwork.com)

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@8483 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/applications/mod_dptools/mod_dptools.c

@@ -1436,7 +1436,7 @@ SWITCH_STANDARD_APP(att_xfer_function)
 		timelimit = atoi(var);
 	}
 
-	if (switch_ivr_originate(session, &peer_session, &cause, data, timelimit, NULL, NULL, NULL, NULL, SOF_NONE) != SWITCH_STATUS_SUCCESS) {
+	if (switch_ivr_originate(session, &peer_session, &cause, data, timelimit, NULL, NULL, NULL, NULL, SOF_NONE) != SWITCH_STATUS_SUCCESS || !peer_session) {
 		goto end;
 	}
 
@@ -1475,13 +1475,10 @@ SWITCH_STANDARD_APP(att_xfer_function)
 		
 		switch_channel_set_variable(channel, SWITCH_SIGNAL_BOND_VARIABLE, bond);
 	}
-
- end:
 	
-	if (peer_session) {
-		switch_core_session_rwunlock(peer_session);
-	}
+	switch_core_session_rwunlock(peer_session);
 	
+ end:
 	switch_channel_set_variable(channel, SWITCH_HOLDING_UUID_VARIABLE, NULL);
 }