awgtpman: initialize RPC result before call

RPC results need to be cleared before calling an RPC function.

src/gds/awgtpman/testpoint.c

@@ -1080,6 +1080,7 @@ int testAwgTpInterfaceVersion(int node)
 
     testpoint_t     tp[ 128 ];
     resultQueryTP_r result;
+    memset (&result, 0, sizeof (resultQueryTP_r));
 
     int chk = testpoint_client( );