fix gprc_cli segfault when using binary in and out (#31411)
fix gprc_cli segfault when using binary in and out (#31411)


stanley-cheung/grpc,grpc/grpc,jtattermusch/grpc,stanley-cheung/grpc,stanley-cheung/grpc,jtattermusch/grpc,grpc/grpc,stanley-cheung/grpc,jtattermusch/grpc,stanley-cheung/grpc,jtattermusch/grpc,jtattermusch/grpc,grpc/grpc,stanley-cheung/grpc,grpc/grpc,stanley-cheung/grpc,stanley-cheung/grpc,stanley-cheung/grpc,jtattermusch/grpc,stanley-cheung/grpc,stanley-cheung/grpc,grpc/grpc,jtattermusch/grpc,grpc/grpc,grpc/grpc,jtattermusch/grpc,grpc/grpc,jtattermusch/grpc,jtattermusch/grpc,grpc/grpc,jtattermusch/grpc,grpc/grpc,grpc/grpc,stanley-cheung/grpc,jtattermusch/grpc,grpc/grpc