Restconf PATCH method request failed on item defined by submodule

[zaker139]

Consider YANG models below:
test.yang

module test {
    yang-version 1.1;
    namespace "http://www.test.com/test";
    prefix test;

    include test-augment;

    container con {
        leaf a {
            type string;
        }
    }    
}

test-augment.yang

submodule test-augment {

    belongs-to "test" {
        prefix "test";
    }

    augment "/test:con" {
        leaf b {
            type string;
        }
    }
}

Using restconf PATCH /test:con/a success.

curl -X PATCH -H "Content-Type: application/yang-data+json" -d '{
    "test:a": "hello123"
}' http://localhost/restconf/data/test:con/a

Whereas same request on /test:con/b would failed with error below:

curl -X PATCH -H "Content-Type: application/yang-data+json" -d '{
    "test:b": "hello13434"
}' http://localhost/restconf/data/test:con/b
{
"ietf-restconf:errors" : {
  "error": {
    "error-type": "rpc",
    "error-tag": "malformed-message",
    "error-severity": "error",
    "error-message": "Data is not prefixed with matching namespace"
  }
}

}

Seems in restconf_methods.c:372, ymoddata and ymodapi are not the samething.

clixon/apps/restconf/restconf_methods.c

Line 372 in 31719b5

if (ymoddata && ymodapi){

ymodapi points to a submodule yang_stmt, but ymoddata points to a main module.

[olofhagsand]

Thanks for detecting this important cornercase error.
Please verify the submitted fix.

[zaker139]

Issue fixed