libvideorender: CB2 error keep last frame [1/1]

PD#SWPL-145445

Problem:
when doing YTS dual video test case,setting pip case keep last
frame

Solution:
only doing pip set

Verify:
ap222

Change-Id: I7af5cbf38fa8d623d7a696cc673c322a6646d9ba
Signed-off-by: fei.deng <fei.deng@amlogic.com>
diff --git a/westeros/wstclient_plugin.cpp b/westeros/wstclient_plugin.cpp
index 70341e0..4c12c3e 100644
--- a/westeros/wstclient_plugin.cpp
+++ b/westeros/wstclient_plugin.cpp
@@ -409,7 +409,7 @@
         case PLUGIN_KEY_VIDEO_PIP: {
             int pip = *(int *) (value);
             mIsVideoPip = pip > 0? true:false;
-        };
+        } break;
         case PLUGIN_KEY_KEEP_LAST_FRAME: {
             int keep = *(int *) (value);
             mKeepLastFrame.value = keep > 0? true:false;