Initialize buf.outobj in multibyte encoder (closes issue #24702).
Patch by pankaj.s01.
diff --git a/Modules/cjkcodecs/multibytecodec.c b/Modules/cjkcodecs/multibytecodec.c
index 3f75fe7..376f8ee 100644
--- a/Modules/cjkcodecs/multibytecodec.c
+++ b/Modules/cjkcodecs/multibytecodec.c
@@ -478,6 +478,7 @@
         return PyString_FromString("");
 
     buf.excobj = NULL;
+    buf.outobj = NULL;
     buf.inbuf = buf.inbuf_top = *data;
     buf.inbuf_end = buf.inbuf_top + datalen;